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Finding the Fourth Proportional to 749.68, 1,123.70 and 383.96

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Solution

The fourth proportional to 749.68, 1,123.70 and 383.96 is: 575.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.68 : 1,123.70 = 383.96 : x
  2. Step 2: Convert to fraction form
    749.68/1,123.70 = 383.96/x
  3. Step 3: Cross multiply
    749.68x = 1,123.70 × 383.96
  4. Step 4: Simplify right side
    749.68x = 431,455.85
  5. Step 5: Solve for x
    x = 431,455.85/749.68
  6. Step 6: Final answer
    x = 575.52

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Half scale
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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.