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Finding the Fourth Proportional to 381,686.10, 572,791.50 and 132,368.10

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Solution

The fourth proportional to 381,686.10, 572,791.50 and 132,368.10 is: 198,643.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,686.10 : 572,791.50 = 132,368.10 : x
  2. Step 2: Convert to fraction form
    381,686.10/572,791.50 = 132,368.10/x
  3. Step 3: Cross multiply
    381,686.10x = 572,791.50 × 132,368.10
  4. Step 4: Simplify right side
    381,686.10x = 75,819,322,551.15
  5. Step 5: Solve for x
    x = 75,819,322,551.15/381,686.10
  6. Step 6: Final answer
    x = 198,643.13

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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.