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Finding the Fourth Proportional to 632.48, 948.28 and 427.20

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Solution

The fourth proportional to 632.48, 948.28 and 427.20 is: 640.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.48 : 948.28 = 427.20 : x
  2. Step 2: Convert to fraction form
    632.48/948.28 = 427.20/x
  3. Step 3: Cross multiply
    632.48x = 948.28 × 427.20
  4. Step 4: Simplify right side
    632.48x = 405,105.22
  5. Step 5: Solve for x
    x = 405,105.22/632.48
  6. Step 6: Final answer
    x = 640.50

Related Problems

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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.