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Finding the Fourth Proportional to 881.22, 1,215.73 and 549.75

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Solution

The fourth proportional to 881.22, 1,215.73 and 549.75 is: 758.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.22 : 1,215.73 = 549.75 : x
  2. Step 2: Convert to fraction form
    881.22/1,215.73 = 549.75/x
  3. Step 3: Cross multiply
    881.22x = 1,215.73 × 549.75
  4. Step 4: Simplify right side
    881.22x = 668,347.57
  5. Step 5: Solve for x
    x = 668,347.57/881.22
  6. Step 6: Final answer
    x = 758.43

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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.