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Finding the Fourth Proportional to 345.70, 476.97 and 272.02

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Solution

The fourth proportional to 345.70, 476.97 and 272.02 is: 375.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.70 : 476.97 = 272.02 : x
  2. Step 2: Convert to fraction form
    345.70/476.97 = 272.02/x
  3. Step 3: Cross multiply
    345.70x = 476.97 × 272.02
  4. Step 4: Simplify right side
    345.70x = 129,745.38
  5. Step 5: Solve for x
    x = 129,745.38/345.70
  6. Step 6: Final answer
    x = 375.31

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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.