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Finding the Fourth Proportional to 440.75, 660.19 and 286.22

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Solution

The fourth proportional to 440.75, 660.19 and 286.22 is: 428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.75 : 660.19 = 286.22 : x
  2. Step 2: Convert to fraction form
    440.75/660.19 = 286.22/x
  3. Step 3: Cross multiply
    440.75x = 660.19 × 286.22
  4. Step 4: Simplify right side
    440.75x = 188,959.58
  5. Step 5: Solve for x
    x = 188,959.58/440.75
  6. Step 6: Final answer
    x = 428.72

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Double scale
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Similar ratio
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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.