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Finding the Fourth Proportional to 639,251.70, 958,877.55 and 525,090.30

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Solution

The fourth proportional to 639,251.70, 958,877.55 and 525,090.30 is: 787,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,251.70 : 958,877.55 = 525,090.30 : x
  2. Step 2: Convert to fraction form
    639,251.70/958,877.55 = 525,090.30/x
  3. Step 3: Cross multiply
    639,251.70x = 958,877.55 × 525,090.30
  4. Step 4: Simplify right side
    639,251.70x = 503,497,300,392.77
  5. Step 5: Solve for x
    x = 503,497,300,392.77/639,251.70
  6. Step 6: Final answer
    x = 787,635.45

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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.