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Finding the Fourth Proportional to 1,498.89, 2,248.31 and 621.86

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Solution

The fourth proportional to 1,498.89, 2,248.31 and 621.86 is: 932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,498.89 : 2,248.31 = 621.86 : x
  2. Step 2: Convert to fraction form
    1,498.89/2,248.31 = 621.86/x
  3. Step 3: Cross multiply
    1,498.89x = 2,248.31 × 621.86
  4. Step 4: Simplify right side
    1,498.89x = 1,398,133.52
  5. Step 5: Solve for x
    x = 1,398,133.52/1,498.89
  6. Step 6: Final answer
    x = 932.78

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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.