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Finding the Fourth Proportional to 399,691.56, 551,581.56 and 218,411.04

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Solution

The fourth proportional to 399,691.56, 551,581.56 and 218,411.04 is: 301,411.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,691.56 : 551,581.56 = 218,411.04 : x
  2. Step 2: Convert to fraction form
    399,691.56/551,581.56 = 218,411.04/x
  3. Step 3: Cross multiply
    399,691.56x = 551,581.56 × 218,411.04
  4. Step 4: Simplify right side
    399,691.56x = 120,471,502,164.42
  5. Step 5: Solve for x
    x = 120,471,502,164.42/399,691.56
  6. Step 6: Final answer
    x = 301,411.17

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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.