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Finding the Fourth Proportional to 880.90, 1,321.36 and 447.55

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Solution

The fourth proportional to 880.90, 1,321.36 and 447.55 is: 671.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.90 : 1,321.36 = 447.55 : x
  2. Step 2: Convert to fraction form
    880.90/1,321.36 = 447.55/x
  3. Step 3: Cross multiply
    880.90x = 1,321.36 × 447.55
  4. Step 4: Simplify right side
    880.90x = 591,370.25
  5. Step 5: Solve for x
    x = 591,370.25/880.90
  6. Step 6: Final answer
    x = 671.33

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1.5x scale

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.