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Finding the Fourth Proportional to 2,579.42, 3,869.68 and 731.10

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Solution

The fourth proportional to 2,579.42, 3,869.68 and 731.10 is: 1,096.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.42 : 3,869.68 = 731.10 : x
  2. Step 2: Convert to fraction form
    2,579.42/3,869.68 = 731.10/x
  3. Step 3: Cross multiply
    2,579.42x = 3,869.68 × 731.10
  4. Step 4: Simplify right side
    2,579.42x = 2,829,123.05
  5. Step 5: Solve for x
    x = 2,829,123.05/2,579.42
  6. Step 6: Final answer
    x = 1,096.81

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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.