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Finding the Fourth Proportional to 521,013.40, 781,520.10 and 352,614.40

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Solution

The fourth proportional to 521,013.40, 781,520.10 and 352,614.40 is: 528,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,013.40 : 781,520.10 = 352,614.40 : x
  2. Step 2: Convert to fraction form
    521,013.40/781,520.10 = 352,614.40/x
  3. Step 3: Cross multiply
    521,013.40x = 781,520.10 × 352,614.40
  4. Step 4: Simplify right side
    521,013.40x = 275,575,241,149.44
  5. Step 5: Solve for x
    x = 275,575,241,149.44/521,013.40
  6. Step 6: Final answer
    x = 528,921.60

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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.