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Finding the Fourth Proportional to 994.38, 1,491.72 and 300.96

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Solution

The fourth proportional to 994.38, 1,491.72 and 300.96 is: 451.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.38 : 1,491.72 = 300.96 : x
  2. Step 2: Convert to fraction form
    994.38/1,491.72 = 300.96/x
  3. Step 3: Cross multiply
    994.38x = 1,491.72 × 300.96
  4. Step 4: Simplify right side
    994.38x = 448,948.05
  5. Step 5: Solve for x
    x = 448,948.05/994.38
  6. Step 6: Final answer
    x = 451.49

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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.