Home / 521,428.60-782,142.90-403,330.60

Finding the Fourth Proportional to 521,428.60, 782,142.90 and 403,330.60

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Solution

The fourth proportional to 521,428.60, 782,142.90 and 403,330.60 is: 604,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,428.60 : 782,142.90 = 403,330.60 : x
  2. Step 2: Convert to fraction form
    521,428.60/782,142.90 = 403,330.60/x
  3. Step 3: Cross multiply
    521,428.60x = 782,142.90 × 403,330.60
  4. Step 4: Simplify right side
    521,428.60x = 315,462,165,142.74
  5. Step 5: Solve for x
    x = 315,462,165,142.74/521,428.60
  6. Step 6: Final answer
    x = 604,995.90

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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.