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Finding the Fourth Proportional to 922.44, 1,272.84 and 549.42

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Solution

The fourth proportional to 922.44, 1,272.84 and 549.42 is: 758.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.44 : 1,272.84 = 549.42 : x
  2. Step 2: Convert to fraction form
    922.44/1,272.84 = 549.42/x
  3. Step 3: Cross multiply
    922.44x = 1,272.84 × 549.42
  4. Step 4: Simplify right side
    922.44x = 699,323.75
  5. Step 5: Solve for x
    x = 699,323.75/922.44
  6. Step 6: Final answer
    x = 758.12

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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.