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Finding the Fourth Proportional to 881.07, 1,215.08 and 549.53

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Solution

The fourth proportional to 881.07, 1,215.08 and 549.53 is: 757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.07 : 1,215.08 = 549.53 : x
  2. Step 2: Convert to fraction form
    881.07/1,215.08 = 549.53/x
  3. Step 3: Cross multiply
    881.07x = 1,215.08 × 549.53
  4. Step 4: Simplify right side
    881.07x = 667,722.91
  5. Step 5: Solve for x
    x = 667,722.91/881.07
  6. Step 6: Final answer
    x = 757.85

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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.