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Finding the Fourth Proportional to 399,888.43, 551,847.13 and 218,602.53

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Solution

The fourth proportional to 399,888.43, 551,847.13 and 218,602.53 is: 301,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,888.43 : 551,847.13 = 218,602.53 : x
  2. Step 2: Convert to fraction form
    399,888.43/551,847.13 = 218,602.53/x
  3. Step 3: Cross multiply
    399,888.43x = 551,847.13 × 218,602.53
  4. Step 4: Simplify right side
    399,888.43x = 120,635,178,244.73
  5. Step 5: Solve for x
    x = 120,635,178,244.73/399,888.43
  6. Step 6: Final answer
    x = 301,672.09

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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.