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Finding the Fourth Proportional to 411,246.30, 616,869.45 and 130,791.90

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Solution

The fourth proportional to 411,246.30, 616,869.45 and 130,791.90 is: 196,187.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,246.30 : 616,869.45 = 130,791.90 : x
  2. Step 2: Convert to fraction form
    411,246.30/616,869.45 = 130,791.90/x
  3. Step 3: Cross multiply
    411,246.30x = 616,869.45 × 130,791.90
  4. Step 4: Simplify right side
    411,246.30x = 80,681,527,417.46
  5. Step 5: Solve for x
    x = 80,681,527,417.46/411,246.30
  6. Step 6: Final answer
    x = 196,187.85

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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.