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Finding the Fourth Proportional to 1,371.49, 2,057.19 and 549.54

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Solution

The fourth proportional to 1,371.49, 2,057.19 and 549.54 is: 824.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.49 : 2,057.19 = 549.54 : x
  2. Step 2: Convert to fraction form
    1,371.49/2,057.19 = 549.54/x
  3. Step 3: Cross multiply
    1,371.49x = 2,057.19 × 549.54
  4. Step 4: Simplify right side
    1,371.49x = 1,130,505.44
  5. Step 5: Solve for x
    x = 1,130,505.44/1,371.49
  6. Step 6: Final answer
    x = 824.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.