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Finding the Fourth Proportional to 218,891.31, 328,312.44 and 58,979.13

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Solution

The fourth proportional to 218,891.31, 328,312.44 and 58,979.13 is: 88,462.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,891.31 : 328,312.44 = 58,979.13 : x
  2. Step 2: Convert to fraction form
    218,891.31/328,312.44 = 58,979.13/x
  3. Step 3: Cross multiply
    218,891.31x = 328,312.44 × 58,979.13
  4. Step 4: Simplify right side
    218,891.31x = 19,363,582,079.38
  5. Step 5: Solve for x
    x = 19,363,582,079.38/218,891.31
  6. Step 6: Final answer
    x = 88,462.09

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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.