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Finding the Fourth Proportional to 486,990.88, 672,034.92 and 272,132.72

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Solution

The fourth proportional to 486,990.88, 672,034.92 and 272,132.72 is: 375,536.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,990.88 : 672,034.92 = 272,132.72 : x
  2. Step 2: Convert to fraction form
    486,990.88/672,034.92 = 272,132.72/x
  3. Step 3: Cross multiply
    486,990.88x = 672,034.92 × 272,132.72
  4. Step 4: Simplify right side
    486,990.88x = 182,882,690,714.58
  5. Step 5: Solve for x
    x = 182,882,690,714.58/486,990.88
  6. Step 6: Final answer
    x = 375,536.17

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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.