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Finding the Fourth Proportional to 307,691.43, 424,613.25 and 171,723.89

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Solution

The fourth proportional to 307,691.43, 424,613.25 and 171,723.89 is: 236,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,691.43 : 424,613.25 = 171,723.89 : x
  2. Step 2: Convert to fraction form
    307,691.43/424,613.25 = 171,723.89/x
  3. Step 3: Cross multiply
    307,691.43x = 424,613.25 × 171,723.89
  4. Step 4: Simplify right side
    307,691.43x = 72,916,236,912.48
  5. Step 5: Solve for x
    x = 72,916,236,912.48/307,691.43
  6. Step 6: Final answer
    x = 236,978.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.