Home / 521,731.20-782,596.80-403,487.40

Finding the Fourth Proportional to 521,731.20, 782,596.80 and 403,487.40

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Solution

The fourth proportional to 521,731.20, 782,596.80 and 403,487.40 is: 605,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,731.20 : 782,596.80 = 403,487.40 : x
  2. Step 2: Convert to fraction form
    521,731.20/782,596.80 = 403,487.40/x
  3. Step 3: Cross multiply
    521,731.20x = 782,596.80 × 403,487.40
  4. Step 4: Simplify right side
    521,731.20x = 315,767,948,080.32
  5. Step 5: Solve for x
    x = 315,767,948,080.32/521,731.20
  6. Step 6: Final answer
    x = 605,231.10

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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.