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Finding the Fourth Proportional to 376.71, 565.07 and 129.90

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Solution

The fourth proportional to 376.71, 565.07 and 129.90 is: 194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.71 : 565.07 = 129.90 : x
  2. Step 2: Convert to fraction form
    376.71/565.07 = 129.90/x
  3. Step 3: Cross multiply
    376.71x = 565.07 × 129.90
  4. Step 4: Simplify right side
    376.71x = 73,401.94
  5. Step 5: Solve for x
    x = 73,401.94/376.71
  6. Step 6: Final answer
    x = 194.85

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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.