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Finding the Fourth Proportional to 630.40, 945.72 and 197.56

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Solution

The fourth proportional to 630.40, 945.72 and 197.56 is: 296.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.40 : 945.72 = 197.56 : x
  2. Step 2: Convert to fraction form
    630.40/945.72 = 197.56/x
  3. Step 3: Cross multiply
    630.40x = 945.72 × 197.56
  4. Step 4: Simplify right side
    630.40x = 186,836.44
  5. Step 5: Solve for x
    x = 186,836.44/630.40
  6. Step 6: Final answer
    x = 296.38

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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.