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Finding the Fourth Proportional to 307,687.38, 424,629.90 and 171,747.78

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Solution

The fourth proportional to 307,687.38, 424,629.90 and 171,747.78 is: 237,023.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,687.38 : 424,629.90 = 171,747.78 : x
  2. Step 2: Convert to fraction form
    307,687.38/424,629.90 = 171,747.78/x
  3. Step 3: Cross multiply
    307,687.38x = 424,629.90 × 171,747.78
  4. Step 4: Simplify right side
    307,687.38x = 72,929,242,646.62
  5. Step 5: Solve for x
    x = 72,929,242,646.62/307,687.38
  6. Step 6: Final answer
    x = 237,023.83

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1.5x scale

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.