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Finding the Fourth Proportional to 447.92, 668.98 and 422.96

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Solution

The fourth proportional to 447.92, 668.98 and 422.96 is: 631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.92 : 668.98 = 422.96 : x
  2. Step 2: Convert to fraction form
    447.92/668.98 = 422.96/x
  3. Step 3: Cross multiply
    447.92x = 668.98 × 422.96
  4. Step 4: Simplify right side
    447.92x = 282,951.78
  5. Step 5: Solve for x
    x = 282,951.78/447.92
  6. Step 6: Final answer
    x = 631.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.