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Finding the Fourth Proportional to 880.52, 1,326.02 and 638.73

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Solution

The fourth proportional to 880.52, 1,326.02 and 638.73 is: 961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.52 : 1,326.02 = 638.73 : x
  2. Step 2: Convert to fraction form
    880.52/1,326.02 = 638.73/x
  3. Step 3: Cross multiply
    880.52x = 1,326.02 × 638.73
  4. Step 4: Simplify right side
    880.52x = 846,965.56
  5. Step 5: Solve for x
    x = 846,965.56/880.52
  6. Step 6: Final answer
    x = 961.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.