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Finding the Fourth Proportional to 886.30, 1,322.55 and 881.21

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Solution

The fourth proportional to 886.30, 1,322.55 and 881.21 is: 1,314.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.30 : 1,322.55 = 881.21 : x
  2. Step 2: Convert to fraction form
    886.30/1,322.55 = 881.21/x
  3. Step 3: Cross multiply
    886.30x = 1,322.55 × 881.21
  4. Step 4: Simplify right side
    886.30x = 1,165,447.59
  5. Step 5: Solve for x
    x = 1,165,447.59/886.30
  6. Step 6: Final answer
    x = 1,314.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.