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Finding the Fourth Proportional to 884.67, 1,221.38 and 553.55

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Solution

The fourth proportional to 884.67, 1,221.38 and 553.55 is: 764.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.67 : 1,221.38 = 553.55 : x
  2. Step 2: Convert to fraction form
    884.67/1,221.38 = 553.55/x
  3. Step 3: Cross multiply
    884.67x = 1,221.38 × 553.55
  4. Step 4: Simplify right side
    884.67x = 676,086.02
  5. Step 5: Solve for x
    x = 676,086.02/884.67
  6. Step 6: Final answer
    x = 764.22

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Double scale
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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.