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Finding the Fourth Proportional to 356,614.21, 492,178.05 and 220,691.97

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Solution

The fourth proportional to 356,614.21, 492,178.05 and 220,691.97 is: 304,586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,614.21 : 492,178.05 = 220,691.97 : x
  2. Step 2: Convert to fraction form
    356,614.21/492,178.05 = 220,691.97/x
  3. Step 3: Cross multiply
    356,614.21x = 492,178.05 × 220,691.97
  4. Step 4: Simplify right side
    356,614.21x = 108,619,743,445.26
  5. Step 5: Solve for x
    x = 108,619,743,445.26/356,614.21
  6. Step 6: Final answer
    x = 304,586.13

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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.