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Finding the Fourth Proportional to 631.75, 948.05 and 220.89

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Solution

The fourth proportional to 631.75, 948.05 and 220.89 is: 331.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.75 : 948.05 = 220.89 : x
  2. Step 2: Convert to fraction form
    631.75/948.05 = 220.89/x
  3. Step 3: Cross multiply
    631.75x = 948.05 × 220.89
  4. Step 4: Simplify right side
    631.75x = 209,410.02
  5. Step 5: Solve for x
    x = 209,410.02/631.75
  6. Step 6: Final answer
    x = 331.48

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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.