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Finding the Fourth Proportional to 666,942, 1,000,572.17 and 217,663.71

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Solution

The fourth proportional to 666,942, 1,000,572.17 and 217,663.71 is: 326,547.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,942 : 1,000,572.17 = 217,663.71 : x
  2. Step 2: Convert to fraction form
    666,942/1,000,572.17 = 217,663.71/x
  3. Step 3: Cross multiply
    666,942x = 1,000,572.17 × 217,663.71
  4. Step 4: Simplify right side
    666,942x = 217,788,250,644.95
  5. Step 5: Solve for x
    x = 217,788,250,644.95/666,942
  6. Step 6: Final answer
    x = 326,547.51

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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.