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Finding the Fourth Proportional to 372.78, 514.61 and 284.27

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Solution

The fourth proportional to 372.78, 514.61 and 284.27 is: 392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.78 : 514.61 = 284.27 : x
  2. Step 2: Convert to fraction form
    372.78/514.61 = 284.27/x
  3. Step 3: Cross multiply
    372.78x = 514.61 × 284.27
  4. Step 4: Simplify right side
    372.78x = 146,287.39
  5. Step 5: Solve for x
    x = 146,287.39/372.78
  6. Step 6: Final answer
    x = 392.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.