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Finding the Fourth Proportional to 376.70, 564.81 and 239.78

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Solution

The fourth proportional to 376.70, 564.81 and 239.78 is: 359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.70 : 564.81 = 239.78 : x
  2. Step 2: Convert to fraction form
    376.70/564.81 = 239.78/x
  3. Step 3: Cross multiply
    376.70x = 564.81 × 239.78
  4. Step 4: Simplify right side
    376.70x = 135,430.14
  5. Step 5: Solve for x
    x = 135,430.14/376.70
  6. Step 6: Final answer
    x = 359.52

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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.