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Finding the Fourth Proportional to 521,711.70, 782,567.55 and 403,467.90

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Solution

The fourth proportional to 521,711.70, 782,567.55 and 403,467.90 is: 605,201.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,711.70 : 782,567.55 = 403,467.90 : x
  2. Step 2: Convert to fraction form
    521,711.70/782,567.55 = 403,467.90/x
  3. Step 3: Cross multiply
    521,711.70x = 782,567.55 × 403,467.90
  4. Step 4: Simplify right side
    521,711.70x = 315,740,886,006.65
  5. Step 5: Solve for x
    x = 315,740,886,006.65/521,711.70
  6. Step 6: Final answer
    x = 605,201.85

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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.