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Finding the Fourth Proportional to 639,577,053.70, 959,365,580.55 and 639,577,053.70

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Solution

The fourth proportional to 639,577,053.70, 959,365,580.55 and 639,577,053.70 is: 959,365,580.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,577,053.70 : 959,365,580.55 = 639,577,053.70 : x
  2. Step 2: Convert to fraction form
    639,577,053.70/959,365,580.55 = 639,577,053.70/x
  3. Step 3: Cross multiply
    639,577,053.70x = 959,365,580.55 × 639,577,053.70
  4. Step 4: Simplify right side
    639,577,053.70x = 613,588,211,429,359,104
  5. Step 5: Solve for x
    x = 613,588,211,429,359,104/639,577,053.70
  6. Step 6: Final answer
    x = 959,365,580.55

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Double scale
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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.