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Finding the Fourth Proportional to 862.74, 1,294.18 and 375.84

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Solution

The fourth proportional to 862.74, 1,294.18 and 375.84 is: 563.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.74 : 1,294.18 = 375.84 : x
  2. Step 2: Convert to fraction form
    862.74/1,294.18 = 375.84/x
  3. Step 3: Cross multiply
    862.74x = 1,294.18 × 375.84
  4. Step 4: Simplify right side
    862.74x = 486,404.61
  5. Step 5: Solve for x
    x = 486,404.61/862.74
  6. Step 6: Final answer
    x = 563.79

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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.