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Finding the Fourth Proportional to 1,398.90, 2,098.14 and 474.42

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Solution

The fourth proportional to 1,398.90, 2,098.14 and 474.42 is: 711.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.90 : 2,098.14 = 474.42 : x
  2. Step 2: Convert to fraction form
    1,398.90/2,098.14 = 474.42/x
  3. Step 3: Cross multiply
    1,398.90x = 2,098.14 × 474.42
  4. Step 4: Simplify right side
    1,398.90x = 995,399.58
  5. Step 5: Solve for x
    x = 995,399.58/1,398.90
  6. Step 6: Final answer
    x = 711.56

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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.