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Finding the Fourth Proportional to 666,791.75, 1,000,275.51 and 217,355.15

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Solution

The fourth proportional to 666,791.75, 1,000,275.51 and 217,355.15 is: 326,061.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,791.75 : 1,000,275.51 = 217,355.15 : x
  2. Step 2: Convert to fraction form
    666,791.75/1,000,275.51 = 217,355.15/x
  3. Step 3: Cross multiply
    666,791.75x = 1,000,275.51 × 217,355.15
  4. Step 4: Simplify right side
    666,791.75x = 217,415,033,517.38
  5. Step 5: Solve for x
    x = 217,415,033,517.38/666,791.75
  6. Step 6: Final answer
    x = 326,061.37

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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.