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Finding the Fourth Proportional to 266.30, 397.48 and 247.28

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Solution

The fourth proportional to 266.30, 397.48 and 247.28 is: 369.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.30 : 397.48 = 247.28 : x
  2. Step 2: Convert to fraction form
    266.30/397.48 = 247.28/x
  3. Step 3: Cross multiply
    266.30x = 397.48 × 247.28
  4. Step 4: Simplify right side
    266.30x = 98,286.87
  5. Step 5: Solve for x
    x = 98,286.87/266.30
  6. Step 6: Final answer
    x = 369.09

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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.