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Finding the Fourth Proportional to 898.33, 1,239.92 and 549.31

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Solution

The fourth proportional to 898.33, 1,239.92 and 549.31 is: 758.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.33 : 1,239.92 = 549.31 : x
  2. Step 2: Convert to fraction form
    898.33/1,239.92 = 549.31/x
  3. Step 3: Cross multiply
    898.33x = 1,239.92 × 549.31
  4. Step 4: Simplify right side
    898.33x = 681,100.46
  5. Step 5: Solve for x
    x = 681,100.46/898.33
  6. Step 6: Final answer
    x = 758.19

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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.