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Finding the Fourth Proportional to 399,001.60, 598,081.74 and 132,690.88

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Solution

The fourth proportional to 399,001.60, 598,081.74 and 132,690.88 is: 198,896.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,001.60 : 598,081.74 = 132,690.88 : x
  2. Step 2: Convert to fraction form
    399,001.60/598,081.74 = 132,690.88/x
  3. Step 3: Cross multiply
    399,001.60x = 598,081.74 × 132,690.88
  4. Step 4: Simplify right side
    399,001.60x = 79,359,992,392.53
  5. Step 5: Solve for x
    x = 79,359,992,392.53/399,001.60
  6. Step 6: Final answer
    x = 198,896.43

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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.