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Finding the Fourth Proportional to 1,371.21, 2,056.92 and 549.03

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Solution

The fourth proportional to 1,371.21, 2,056.92 and 549.03 is: 823.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.21 : 2,056.92 = 549.03 : x
  2. Step 2: Convert to fraction form
    1,371.21/2,056.92 = 549.03/x
  3. Step 3: Cross multiply
    1,371.21x = 2,056.92 × 549.03
  4. Step 4: Simplify right side
    1,371.21x = 1,129,310.79
  5. Step 5: Solve for x
    x = 1,129,310.79/1,371.21
  6. Step 6: Final answer
    x = 823.59

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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.