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Finding the Fourth Proportional to 844.20, 1,165.25 and 549.47

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Solution

The fourth proportional to 844.20, 1,165.25 and 549.47 is: 758.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.20 : 1,165.25 = 549.47 : x
  2. Step 2: Convert to fraction form
    844.20/1,165.25 = 549.47/x
  3. Step 3: Cross multiply
    844.20x = 1,165.25 × 549.47
  4. Step 4: Simplify right side
    844.20x = 640,274.20
  5. Step 5: Solve for x
    x = 640,274.20/844.20
  6. Step 6: Final answer
    x = 758.44

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Double scale
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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.