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Finding the Fourth Proportional to 630.70, 945.78 and 197.76

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Solution

The fourth proportional to 630.70, 945.78 and 197.76 is: 296.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.70 : 945.78 = 197.76 : x
  2. Step 2: Convert to fraction form
    630.70/945.78 = 197.76/x
  3. Step 3: Cross multiply
    630.70x = 945.78 × 197.76
  4. Step 4: Simplify right side
    630.70x = 187,037.45
  5. Step 5: Solve for x
    x = 187,037.45/630.70
  6. Step 6: Final answer
    x = 296.56

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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.