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Finding the Fourth Proportional to 639,593,346.10, 959,390,019.15 and 639,593,346.10

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Solution

The fourth proportional to 639,593,346.10, 959,390,019.15 and 639,593,346.10 is: 959,390,019.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,593,346.10 : 959,390,019.15 = 639,593,346.10 : x
  2. Step 2: Convert to fraction form
    639,593,346.10/959,390,019.15 = 639,593,346.10/x
  3. Step 3: Cross multiply
    639,593,346.10x = 959,390,019.15 × 639,593,346.10
  4. Step 4: Simplify right side
    639,593,346.10x = 613,619,472,563,091,584
  5. Step 5: Solve for x
    x = 613,619,472,563,091,584/639,593,346.10
  6. Step 6: Final answer
    x = 959,390,019.15

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Half scale
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Double scale
Find fourth proportional to 639,593,347.10, 959,390,020.65 and 639,593,347.10
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.