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Finding the Fourth Proportional to 880.97, 1,215.74 and 549.20

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Solution

The fourth proportional to 880.97, 1,215.74 and 549.20 is: 757.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.97 : 1,215.74 = 549.20 : x
  2. Step 2: Convert to fraction form
    880.97/1,215.74 = 549.20/x
  3. Step 3: Cross multiply
    880.97x = 1,215.74 × 549.20
  4. Step 4: Simplify right side
    880.97x = 667,675.58
  5. Step 5: Solve for x
    x = 667,675.58/880.97
  6. Step 6: Final answer
    x = 757.89

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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.