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Finding the Fourth Proportional to 922.68, 1,272.85 and 549.54

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Solution

The fourth proportional to 922.68, 1,272.85 and 549.54 is: 758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.68 : 1,272.85 = 549.54 : x
  2. Step 2: Convert to fraction form
    922.68/1,272.85 = 549.54/x
  3. Step 3: Cross multiply
    922.68x = 1,272.85 × 549.54
  4. Step 4: Simplify right side
    922.68x = 699,479.24
  5. Step 5: Solve for x
    x = 699,479.24/922.68
  6. Step 6: Final answer
    x = 758.10

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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.