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Finding the Fourth Proportional to 659,061.20, 988,534.20 and 215,829.20

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Solution

The fourth proportional to 659,061.20, 988,534.20 and 215,829.20 is: 323,724.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,061.20 : 988,534.20 = 215,829.20 : x
  2. Step 2: Convert to fraction form
    659,061.20/988,534.20 = 215,829.20/x
  3. Step 3: Cross multiply
    659,061.20x = 988,534.20 × 215,829.20
  4. Step 4: Simplify right side
    659,061.20x = 213,354,545,558.64
  5. Step 5: Solve for x
    x = 213,354,545,558.64/659,061.20
  6. Step 6: Final answer
    x = 323,724.94

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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.