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Finding the Fourth Proportional to 659,132.70, 988,641.45 and 215,900.70

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Solution

The fourth proportional to 659,132.70, 988,641.45 and 215,900.70 is: 323,832.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,132.70 : 988,641.45 = 215,900.70 : x
  2. Step 2: Convert to fraction form
    659,132.70/988,641.45 = 215,900.70/x
  3. Step 3: Cross multiply
    659,132.70x = 988,641.45 × 215,900.70
  4. Step 4: Simplify right side
    659,132.70x = 213,448,381,104.02
  5. Step 5: Solve for x
    x = 213,448,381,104.02/659,132.70
  6. Step 6: Final answer
    x = 323,832.18

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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.