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Finding the Fourth Proportional to 265,609.52, 398,492.09 and 85,691.30

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Solution

The fourth proportional to 265,609.52, 398,492.09 and 85,691.30 is: 128,562.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,609.52 : 398,492.09 = 85,691.30 : x
  2. Step 2: Convert to fraction form
    265,609.52/398,492.09 = 85,691.30/x
  3. Step 3: Cross multiply
    265,609.52x = 398,492.09 × 85,691.30
  4. Step 4: Simplify right side
    265,609.52x = 34,147,302,810.90
  5. Step 5: Solve for x
    x = 34,147,302,810.90/265,609.52
  6. Step 6: Final answer
    x = 128,562.05

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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.