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Finding the Fourth Proportional to 2,343.70, 3,515.85 and 863.02

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Solution

The fourth proportional to 2,343.70, 3,515.85 and 863.02 is: 1,294.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,343.70 : 3,515.85 = 863.02 : x
  2. Step 2: Convert to fraction form
    2,343.70/3,515.85 = 863.02/x
  3. Step 3: Cross multiply
    2,343.70x = 3,515.85 × 863.02
  4. Step 4: Simplify right side
    2,343.70x = 3,034,248.87
  5. Step 5: Solve for x
    x = 3,034,248.87/2,343.70
  6. Step 6: Final answer
    x = 1,294.64

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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.