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Finding the Fourth Proportional to 880.06, 1,213.36 and 722.12

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Solution

The fourth proportional to 880.06, 1,213.36 and 722.12 is: 995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.06 : 1,213.36 = 722.12 : x
  2. Step 2: Convert to fraction form
    880.06/1,213.36 = 722.12/x
  3. Step 3: Cross multiply
    880.06x = 1,213.36 × 722.12
  4. Step 4: Simplify right side
    880.06x = 876,191.52
  5. Step 5: Solve for x
    x = 876,191.52/880.06
  6. Step 6: Final answer
    x = 995.60

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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.