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Finding the Fourth Proportional to 398,670.75, 598,107.15 and 132,432.66

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Solution

The fourth proportional to 398,670.75, 598,107.15 and 132,432.66 is: 198,682.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,670.75 : 598,107.15 = 132,432.66 : x
  2. Step 2: Convert to fraction form
    398,670.75/598,107.15 = 132,432.66/x
  3. Step 3: Cross multiply
    398,670.75x = 598,107.15 × 132,432.66
  4. Step 4: Simplify right side
    398,670.75x = 79,208,920,839.52
  5. Step 5: Solve for x
    x = 79,208,920,839.52/398,670.75
  6. Step 6: Final answer
    x = 198,682.55

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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.