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Finding the Fourth Proportional to 391.77, 591.03 and 372.60

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Solution

The fourth proportional to 391.77, 591.03 and 372.60 is: 562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.77 : 591.03 = 372.60 : x
  2. Step 2: Convert to fraction form
    391.77/591.03 = 372.60/x
  3. Step 3: Cross multiply
    391.77x = 591.03 × 372.60
  4. Step 4: Simplify right side
    391.77x = 220,217.78
  5. Step 5: Solve for x
    x = 220,217.78/391.77
  6. Step 6: Final answer
    x = 562.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.