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Finding the Fourth Proportional to 387.18, 584.21 and 372.94

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Solution

The fourth proportional to 387.18, 584.21 and 372.94 is: 562.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.18 : 584.21 = 372.94 : x
  2. Step 2: Convert to fraction form
    387.18/584.21 = 372.94/x
  3. Step 3: Cross multiply
    387.18x = 584.21 × 372.94
  4. Step 4: Simplify right side
    387.18x = 217,874.75
  5. Step 5: Solve for x
    x = 217,874.75/387.18
  6. Step 6: Final answer
    x = 562.72

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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.