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Finding the Fourth Proportional to 498.75, 748.25 and 156.75

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Solution

The fourth proportional to 498.75, 748.25 and 156.75 is: 235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.75 : 748.25 = 156.75 : x
  2. Step 2: Convert to fraction form
    498.75/748.25 = 156.75/x
  3. Step 3: Cross multiply
    498.75x = 748.25 × 156.75
  4. Step 4: Simplify right side
    498.75x = 117,287.40
  5. Step 5: Solve for x
    x = 117,287.40/498.75
  6. Step 6: Final answer
    x = 235.16

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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.