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Finding the Fourth Proportional to 632.48, 948.74 and 285.75

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Solution

The fourth proportional to 632.48, 948.74 and 285.75 is: 428.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.48 : 948.74 = 285.75 : x
  2. Step 2: Convert to fraction form
    632.48/948.74 = 285.75/x
  3. Step 3: Cross multiply
    632.48x = 948.74 × 285.75
  4. Step 4: Simplify right side
    632.48x = 271,104.50
  5. Step 5: Solve for x
    x = 271,104.50/632.48
  6. Step 6: Final answer
    x = 428.63

Related Problems

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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.