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Finding the Fourth Proportional to 485,892, 670,498.56 and 279,167.04

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Solution

The fourth proportional to 485,892, 670,498.56 and 279,167.04 is: 385,231.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,892 : 670,498.56 = 279,167.04 : x
  2. Step 2: Convert to fraction form
    485,892/670,498.56 = 279,167.04/x
  3. Step 3: Cross multiply
    485,892x = 670,498.56 × 279,167.04
  4. Step 4: Simplify right side
    485,892x = 187,181,098,319.46
  5. Step 5: Solve for x
    x = 187,181,098,319.46/485,892
  6. Step 6: Final answer
    x = 385,231.90

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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.