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Finding the Fourth Proportional to 399,912.83, 551,886.27 and 238,781.96

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Solution

The fourth proportional to 399,912.83, 551,886.27 and 238,781.96 is: 329,523.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,912.83 : 551,886.27 = 238,781.96 : x
  2. Step 2: Convert to fraction form
    399,912.83/551,886.27 = 238,781.96/x
  3. Step 3: Cross multiply
    399,912.83x = 551,886.27 × 238,781.96
  4. Step 4: Simplify right side
    399,912.83x = 131,780,486,030.45
  5. Step 5: Solve for x
    x = 131,780,486,030.45/399,912.83
  6. Step 6: Final answer
    x = 329,523.02

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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.