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Finding the Fourth Proportional to 307,398.74, 424,209.47 and 171,432.86

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Solution

The fourth proportional to 307,398.74, 424,209.47 and 171,432.86 is: 236,576.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,398.74 : 424,209.47 = 171,432.86 : x
  2. Step 2: Convert to fraction form
    307,398.74/424,209.47 = 171,432.86/x
  3. Step 3: Cross multiply
    307,398.74x = 424,209.47 × 171,432.86
  4. Step 4: Simplify right side
    307,398.74x = 72,723,439,702.97
  5. Step 5: Solve for x
    x = 72,723,439,702.97/307,398.74
  6. Step 6: Final answer
    x = 236,576.90

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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.