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Finding the Fourth Proportional to 381,691.20, 572,536.80 and 362,445.60

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Solution

The fourth proportional to 381,691.20, 572,536.80 and 362,445.60 is: 543,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,691.20 : 572,536.80 = 362,445.60 : x
  2. Step 2: Convert to fraction form
    381,691.20/572,536.80 = 362,445.60/x
  3. Step 3: Cross multiply
    381,691.20x = 572,536.80 × 362,445.60
  4. Step 4: Simplify right side
    381,691.20x = 207,513,443,998.08
  5. Step 5: Solve for x
    x = 207,513,443,998.08/381,691.20
  6. Step 6: Final answer
    x = 543,668.40

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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.