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Finding the Fourth Proportional to 661,294.62, 991,920.06 and 287,317.62

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Solution

The fourth proportional to 661,294.62, 991,920.06 and 287,317.62 is: 430,966.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,294.62 : 991,920.06 = 287,317.62 : x
  2. Step 2: Convert to fraction form
    661,294.62/991,920.06 = 287,317.62/x
  3. Step 3: Cross multiply
    661,294.62x = 991,920.06 × 287,317.62
  4. Step 4: Simplify right side
    661,294.62x = 284,996,110,869.46
  5. Step 5: Solve for x
    x = 284,996,110,869.46/661,294.62
  6. Step 6: Final answer
    x = 430,966.93

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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.