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Finding the Fourth Proportional to 266.48, 398.88 and 169.07

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Solution

The fourth proportional to 266.48, 398.88 and 169.07 is: 253.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.48 : 398.88 = 169.07 : x
  2. Step 2: Convert to fraction form
    266.48/398.88 = 169.07/x
  3. Step 3: Cross multiply
    266.48x = 398.88 × 169.07
  4. Step 4: Simplify right side
    266.48x = 67,439.64
  5. Step 5: Solve for x
    x = 67,439.64/266.48
  6. Step 6: Final answer
    x = 253.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.