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Finding the Fourth Proportional to 376.56, 519.92 and 284.20

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Solution

The fourth proportional to 376.56, 519.92 and 284.20 is: 392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.56 : 519.92 = 284.20 : x
  2. Step 2: Convert to fraction form
    376.56/519.92 = 284.20/x
  3. Step 3: Cross multiply
    376.56x = 519.92 × 284.20
  4. Step 4: Simplify right side
    376.56x = 147,761.26
  5. Step 5: Solve for x
    x = 147,761.26/376.56
  6. Step 6: Final answer
    x = 392.40

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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.