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Finding the Fourth Proportional to 748.99, 1,123.52 and 201.18

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Solution

The fourth proportional to 748.99, 1,123.52 and 201.18 is: 301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.99 : 1,123.52 = 201.18 : x
  2. Step 2: Convert to fraction form
    748.99/1,123.52 = 201.18/x
  3. Step 3: Cross multiply
    748.99x = 1,123.52 × 201.18
  4. Step 4: Simplify right side
    748.99x = 226,027.77
  5. Step 5: Solve for x
    x = 226,027.77/748.99
  6. Step 6: Final answer
    x = 301.78

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Double scale
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Similar ratio
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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.