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Finding the Fourth Proportional to 438,493.39, 655,839.69 and 258,149.05

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Solution

The fourth proportional to 438,493.39, 655,839.69 and 258,149.05 is: 386,104.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,493.39 : 655,839.69 = 258,149.05 : x
  2. Step 2: Convert to fraction form
    438,493.39/655,839.69 = 258,149.05/x
  3. Step 3: Cross multiply
    438,493.39x = 655,839.69 × 258,149.05
  4. Step 4: Simplify right side
    438,493.39x = 169,304,392,925.79
  5. Step 5: Solve for x
    x = 169,304,392,925.79/438,493.39
  6. Step 6: Final answer
    x = 386,104.78

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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.