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Finding the Fourth Proportional to 547,727.85, 755,734.89 and 318,148.71

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Solution

The fourth proportional to 547,727.85, 755,734.89 and 318,148.71 is: 438,969.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,727.85 : 755,734.89 = 318,148.71 : x
  2. Step 2: Convert to fraction form
    547,727.85/755,734.89 = 318,148.71/x
  3. Step 3: Cross multiply
    547,727.85x = 755,734.89 × 318,148.71
  4. Step 4: Simplify right side
    547,727.85x = 240,436,080,654.09
  5. Step 5: Solve for x
    x = 240,436,080,654.09/547,727.85
  6. Step 6: Final answer
    x = 438,969.98

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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.