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Finding the Fourth Proportional to 1,251.90, 1,878.17 and 374.42

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Solution

The fourth proportional to 1,251.90, 1,878.17 and 374.42 is: 561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.90 : 1,878.17 = 374.42 : x
  2. Step 2: Convert to fraction form
    1,251.90/1,878.17 = 374.42/x
  3. Step 3: Cross multiply
    1,251.90x = 1,878.17 × 374.42
  4. Step 4: Simplify right side
    1,251.90x = 703,224.41
  5. Step 5: Solve for x
    x = 703,224.41/1,251.90
  6. Step 6: Final answer
    x = 561.73

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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.