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Finding the Fourth Proportional to 922.70, 1,272.87 and 549.42

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Solution

The fourth proportional to 922.70, 1,272.87 and 549.42 is: 757.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.70 : 1,272.87 = 549.42 : x
  2. Step 2: Convert to fraction form
    922.70/1,272.87 = 549.42/x
  3. Step 3: Cross multiply
    922.70x = 1,272.87 × 549.42
  4. Step 4: Simplify right side
    922.70x = 699,340.24
  5. Step 5: Solve for x
    x = 699,340.24/922.70
  6. Step 6: Final answer
    x = 757.93

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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.