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Finding the Fourth Proportional to 521,379.52, 719,336.40 and 291,902.96

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Solution

The fourth proportional to 521,379.52, 719,336.40 and 291,902.96 is: 402,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,379.52 : 719,336.40 = 291,902.96 : x
  2. Step 2: Convert to fraction form
    521,379.52/719,336.40 = 291,902.96/x
  3. Step 3: Cross multiply
    521,379.52x = 719,336.40 × 291,902.96
  4. Step 4: Simplify right side
    521,379.52x = 209,976,424,395.74
  5. Step 5: Solve for x
    x = 209,976,424,395.74/521,379.52
  6. Step 6: Final answer
    x = 402,732.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.