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Finding the Fourth Proportional to 266.04, 398.88 and 103.68

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Solution

The fourth proportional to 266.04, 398.88 and 103.68 is: 155.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.04 : 398.88 = 103.68 : x
  2. Step 2: Convert to fraction form
    266.04/398.88 = 103.68/x
  3. Step 3: Cross multiply
    266.04x = 398.88 × 103.68
  4. Step 4: Simplify right side
    266.04x = 41,355.88
  5. Step 5: Solve for x
    x = 41,355.88/266.04
  6. Step 6: Final answer
    x = 155.45

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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.