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Finding the Fourth Proportional to 266.69, 398.12 and 248.67

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Solution

The fourth proportional to 266.69, 398.12 and 248.67 is: 371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.69 : 398.12 = 248.67 : x
  2. Step 2: Convert to fraction form
    266.69/398.12 = 248.67/x
  3. Step 3: Cross multiply
    266.69x = 398.12 × 248.67
  4. Step 4: Simplify right side
    266.69x = 98,999.26
  5. Step 5: Solve for x
    x = 98,999.26/266.69
  6. Step 6: Final answer
    x = 371.21

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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.