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Finding the Fourth Proportional to 1,398.88, 2,098.31 and 372.88

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Solution

The fourth proportional to 1,398.88, 2,098.31 and 372.88 is: 559.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.88 : 2,098.31 = 372.88 : x
  2. Step 2: Convert to fraction form
    1,398.88/2,098.31 = 372.88/x
  3. Step 3: Cross multiply
    1,398.88x = 2,098.31 × 372.88
  4. Step 4: Simplify right side
    1,398.88x = 782,417.83
  5. Step 5: Solve for x
    x = 782,417.83/1,398.88
  6. Step 6: Final answer
    x = 559.32

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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.