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Finding the Fourth Proportional to 345.28, 476.80 and 267.52

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Solution

The fourth proportional to 345.28, 476.80 and 267.52 is: 369.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.28 : 476.80 = 267.52 : x
  2. Step 2: Convert to fraction form
    345.28/476.80 = 267.52/x
  3. Step 3: Cross multiply
    345.28x = 476.80 × 267.52
  4. Step 4: Simplify right side
    345.28x = 127,553.54
  5. Step 5: Solve for x
    x = 127,553.54/345.28
  6. Step 6: Final answer
    x = 369.42

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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.