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Finding the Fourth Proportional to 487,791.18, 731,845.88 and 217,886.42

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Solution

The fourth proportional to 487,791.18, 731,845.88 and 217,886.42 is: 326,900.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,791.18 : 731,845.88 = 217,886.42 : x
  2. Step 2: Convert to fraction form
    487,791.18/731,845.88 = 217,886.42/x
  3. Step 3: Cross multiply
    487,791.18x = 731,845.88 × 217,886.42
  4. Step 4: Simplify right side
    487,791.18x = 159,459,278,784.95
  5. Step 5: Solve for x
    x = 159,459,278,784.95/487,791.18
  6. Step 6: Final answer
    x = 326,900.70

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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.