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Finding the Fourth Proportional to 279,839.91, 386,180.53 and 158,987.95

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Solution

The fourth proportional to 279,839.91, 386,180.53 and 158,987.95 is: 219,404.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,839.91 : 386,180.53 = 158,987.95 : x
  2. Step 2: Convert to fraction form
    279,839.91/386,180.53 = 158,987.95/x
  3. Step 3: Cross multiply
    279,839.91x = 386,180.53 × 158,987.95
  4. Step 4: Simplify right side
    279,839.91x = 61,398,049,431.69
  5. Step 5: Solve for x
    x = 61,398,049,431.69/279,839.91
  6. Step 6: Final answer
    x = 219,404.19

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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.