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Finding the Fourth Proportional to 668.68, 922.28 and 447.24

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Solution

The fourth proportional to 668.68, 922.28 and 447.24 is: 616.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.68 : 922.28 = 447.24 : x
  2. Step 2: Convert to fraction form
    668.68/922.28 = 447.24/x
  3. Step 3: Cross multiply
    668.68x = 922.28 × 447.24
  4. Step 4: Simplify right side
    668.68x = 412,480.51
  5. Step 5: Solve for x
    x = 412,480.51/668.68
  6. Step 6: Final answer
    x = 616.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.