Home / 521,003.40-781,505.10-486,011.40

Finding the Fourth Proportional to 521,003.40, 781,505.10 and 486,011.40

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Solution

The fourth proportional to 521,003.40, 781,505.10 and 486,011.40 is: 729,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,003.40 : 781,505.10 = 486,011.40 : x
  2. Step 2: Convert to fraction form
    521,003.40/781,505.10 = 486,011.40/x
  3. Step 3: Cross multiply
    521,003.40x = 781,505.10 × 486,011.40
  4. Step 4: Simplify right side
    521,003.40x = 379,820,387,758.14
  5. Step 5: Solve for x
    x = 379,820,387,758.14/521,003.40
  6. Step 6: Final answer
    x = 729,017.10

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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.