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Finding the Fourth Proportional to 1,781.45, 2,672.26 and 549.70

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Solution

The fourth proportional to 1,781.45, 2,672.26 and 549.70 is: 824.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.45 : 2,672.26 = 549.70 : x
  2. Step 2: Convert to fraction form
    1,781.45/2,672.26 = 549.70/x
  3. Step 3: Cross multiply
    1,781.45x = 2,672.26 × 549.70
  4. Step 4: Simplify right side
    1,781.45x = 1,468,933.27
  5. Step 5: Solve for x
    x = 1,468,933.27/1,781.45
  6. Step 6: Final answer
    x = 824.57

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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.