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Finding the Fourth Proportional to 476.38, 657.31 and 266.57

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Solution

The fourth proportional to 476.38, 657.31 and 266.57 is: 367.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.38 : 657.31 = 266.57 : x
  2. Step 2: Convert to fraction form
    476.38/657.31 = 266.57/x
  3. Step 3: Cross multiply
    476.38x = 657.31 × 266.57
  4. Step 4: Simplify right side
    476.38x = 175,217.91
  5. Step 5: Solve for x
    x = 175,217.91/476.38
  6. Step 6: Final answer
    x = 367.81

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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.