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Finding the Fourth Proportional to 262.38, 391.47 and 248.70

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Solution

The fourth proportional to 262.38, 391.47 and 248.70 is: 371.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.38 : 391.47 = 248.70 : x
  2. Step 2: Convert to fraction form
    262.38/391.47 = 248.70/x
  3. Step 3: Cross multiply
    262.38x = 391.47 × 248.70
  4. Step 4: Simplify right side
    262.38x = 97,358.59
  5. Step 5: Solve for x
    x = 97,358.59/262.38
  6. Step 6: Final answer
    x = 371.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.