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Finding the Fourth Proportional to 881.30, 1,215.68 and 549.61

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Solution

The fourth proportional to 881.30, 1,215.68 and 549.61 is: 758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.30 : 1,215.68 = 549.61 : x
  2. Step 2: Convert to fraction form
    881.30/1,215.68 = 549.61/x
  3. Step 3: Cross multiply
    881.30x = 1,215.68 × 549.61
  4. Step 4: Simplify right side
    881.30x = 668,144.10
  5. Step 5: Solve for x
    x = 668,144.10/881.30
  6. Step 6: Final answer
    x = 758.13

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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.