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Finding the Fourth Proportional to 886.12, 1,222.78 and 549.88

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Solution

The fourth proportional to 886.12, 1,222.78 and 549.88 is: 758.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.12 : 1,222.78 = 549.88 : x
  2. Step 2: Convert to fraction form
    886.12/1,222.78 = 549.88/x
  3. Step 3: Cross multiply
    886.12x = 1,222.78 × 549.88
  4. Step 4: Simplify right side
    886.12x = 672,382.27
  5. Step 5: Solve for x
    x = 672,382.27/886.12
  6. Step 6: Final answer
    x = 758.79

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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.