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Finding the Fourth Proportional to 398,672.75, 598,110.15 and 132,434.66

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Solution

The fourth proportional to 398,672.75, 598,110.15 and 132,434.66 is: 198,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,672.75 : 598,110.15 = 132,434.66 : x
  2. Step 2: Convert to fraction form
    398,672.75/598,110.15 = 132,434.66/x
  3. Step 3: Cross multiply
    398,672.75x = 598,110.15 × 132,434.66
  4. Step 4: Simplify right side
    398,672.75x = 79,210,514,357.80
  5. Step 5: Solve for x
    x = 79,210,514,357.80/398,672.75
  6. Step 6: Final answer
    x = 198,685.55

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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.