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Finding the Fourth Proportional to 632.15, 948.22 and 285.42

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Solution

The fourth proportional to 632.15, 948.22 and 285.42 is: 428.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.15 : 948.22 = 285.42 : x
  2. Step 2: Convert to fraction form
    632.15/948.22 = 285.42/x
  3. Step 3: Cross multiply
    632.15x = 948.22 × 285.42
  4. Step 4: Simplify right side
    632.15x = 270,640.24
  5. Step 5: Solve for x
    x = 270,640.24/632.15
  6. Step 6: Final answer
    x = 428.13

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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.