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Finding the Fourth Proportional to 521,575.20, 782,362.80 and 403,331.40

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Solution

The fourth proportional to 521,575.20, 782,362.80 and 403,331.40 is: 604,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,575.20 : 782,362.80 = 403,331.40 : x
  2. Step 2: Convert to fraction form
    521,575.20/782,362.80 = 403,331.40/x
  3. Step 3: Cross multiply
    521,575.20x = 782,362.80 × 403,331.40
  4. Step 4: Simplify right side
    521,575.20x = 315,551,483,431.92
  5. Step 5: Solve for x
    x = 315,551,483,431.92/521,575.20
  6. Step 6: Final answer
    x = 604,997.10

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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.