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Finding the Fourth Proportional to 376.42, 564.48 and 239.28

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Solution

The fourth proportional to 376.42, 564.48 and 239.28 is: 358.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.42 : 564.48 = 239.28 : x
  2. Step 2: Convert to fraction form
    376.42/564.48 = 239.28/x
  3. Step 3: Cross multiply
    376.42x = 564.48 × 239.28
  4. Step 4: Simplify right side
    376.42x = 135,068.58
  5. Step 5: Solve for x
    x = 135,068.58/376.42
  6. Step 6: Final answer
    x = 358.82

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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.