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Finding the Fourth Proportional to 498.85, 748.30 and 133.63

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Solution

The fourth proportional to 498.85, 748.30 and 133.63 is: 200.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.85 : 748.30 = 133.63 : x
  2. Step 2: Convert to fraction form
    498.85/748.30 = 133.63/x
  3. Step 3: Cross multiply
    498.85x = 748.30 × 133.63
  4. Step 4: Simplify right side
    498.85x = 99,995.33
  5. Step 5: Solve for x
    x = 99,995.33/498.85
  6. Step 6: Final answer
    x = 200.45

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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.