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Finding the Fourth Proportional to 630.43, 945.69 and 197.89

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Solution

The fourth proportional to 630.43, 945.69 and 197.89 is: 296.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.43 : 945.69 = 197.89 : x
  2. Step 2: Convert to fraction form
    630.43/945.69 = 197.89/x
  3. Step 3: Cross multiply
    630.43x = 945.69 × 197.89
  4. Step 4: Simplify right side
    630.43x = 187,142.59
  5. Step 5: Solve for x
    x = 187,142.59/630.43
  6. Step 6: Final answer
    x = 296.85

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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.