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Finding the Fourth Proportional to 801.38, 1,104.90 and 668.79

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Solution

The fourth proportional to 801.38, 1,104.90 and 668.79 is: 922.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.38 : 1,104.90 = 668.79 : x
  2. Step 2: Convert to fraction form
    801.38/1,104.90 = 668.79/x
  3. Step 3: Cross multiply
    801.38x = 1,104.90 × 668.79
  4. Step 4: Simplify right side
    801.38x = 738,939.42
  5. Step 5: Solve for x
    x = 738,939.42/801.38
  6. Step 6: Final answer
    x = 922.09

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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.