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Finding the Fourth Proportional to 782.27, 1,079.17 and 549.53

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Solution

The fourth proportional to 782.27, 1,079.17 and 549.53 is: 758.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.27 : 1,079.17 = 549.53 : x
  2. Step 2: Convert to fraction form
    782.27/1,079.17 = 549.53/x
  3. Step 3: Cross multiply
    782.27x = 1,079.17 × 549.53
  4. Step 4: Simplify right side
    782.27x = 593,029.52
  5. Step 5: Solve for x
    x = 593,029.52/782.27
  6. Step 6: Final answer
    x = 758.09

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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.