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Finding the Fourth Proportional to 376.66, 565.17 and 261.21

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Solution

The fourth proportional to 376.66, 565.17 and 261.21 is: 391.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.66 : 565.17 = 261.21 : x
  2. Step 2: Convert to fraction form
    376.66/565.17 = 261.21/x
  3. Step 3: Cross multiply
    376.66x = 565.17 × 261.21
  4. Step 4: Simplify right side
    376.66x = 147,628.06
  5. Step 5: Solve for x
    x = 147,628.06/376.66
  6. Step 6: Final answer
    x = 391.94

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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.