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Finding the Fourth Proportional to 880.54, 1,213.26 and 722.64

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Solution

The fourth proportional to 880.54, 1,213.26 and 722.64 is: 995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.54 : 1,213.26 = 722.64 : x
  2. Step 2: Convert to fraction form
    880.54/1,213.26 = 722.64/x
  3. Step 3: Cross multiply
    880.54x = 1,213.26 × 722.64
  4. Step 4: Simplify right side
    880.54x = 876,750.21
  5. Step 5: Solve for x
    x = 876,750.21/880.54
  6. Step 6: Final answer
    x = 995.70

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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.