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Finding the Fourth Proportional to 2,372.87, 3,559.98 and 813.08

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Solution

The fourth proportional to 2,372.87, 3,559.98 and 813.08 is: 1,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,372.87 : 3,559.98 = 813.08 : x
  2. Step 2: Convert to fraction form
    2,372.87/3,559.98 = 813.08/x
  3. Step 3: Cross multiply
    2,372.87x = 3,559.98 × 813.08
  4. Step 4: Simplify right side
    2,372.87x = 2,894,548.54
  5. Step 5: Solve for x
    x = 2,894,548.54/2,372.87
  6. Step 6: Final answer
    x = 1,219.85

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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.