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Finding the Fourth Proportional to 942.24, 1,299.96 and 549.18

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Solution

The fourth proportional to 942.24, 1,299.96 and 549.18 is: 757.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.24 : 1,299.96 = 549.18 : x
  2. Step 2: Convert to fraction form
    942.24/1,299.96 = 549.18/x
  3. Step 3: Cross multiply
    942.24x = 1,299.96 × 549.18
  4. Step 4: Simplify right side
    942.24x = 713,912.03
  5. Step 5: Solve for x
    x = 713,912.03/942.24
  6. Step 6: Final answer
    x = 757.68

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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.