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Finding the Fourth Proportional to 574.44, 862.22 and 318.12

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Solution

The fourth proportional to 574.44, 862.22 and 318.12 is: 477.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.44 : 862.22 = 318.12 : x
  2. Step 2: Convert to fraction form
    574.44/862.22 = 318.12/x
  3. Step 3: Cross multiply
    574.44x = 862.22 × 318.12
  4. Step 4: Simplify right side
    574.44x = 274,289.43
  5. Step 5: Solve for x
    x = 274,289.43/574.44
  6. Step 6: Final answer
    x = 477.49

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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.