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Finding the Fourth Proportional to 748.75, 1,123.20 and 235.75

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Solution

The fourth proportional to 748.75, 1,123.20 and 235.75 is: 353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.75 : 1,123.20 = 235.75 : x
  2. Step 2: Convert to fraction form
    748.75/1,123.20 = 235.75/x
  3. Step 3: Cross multiply
    748.75x = 1,123.20 × 235.75
  4. Step 4: Simplify right side
    748.75x = 264,794.40
  5. Step 5: Solve for x
    x = 264,794.40/748.75
  6. Step 6: Final answer
    x = 353.65

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Double scale
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1.5x scale

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.