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Finding the Fourth Proportional to 1,965.95, 2,948.24 and 871.08

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Solution

The fourth proportional to 1,965.95, 2,948.24 and 871.08 is: 1,306.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.95 : 2,948.24 = 871.08 : x
  2. Step 2: Convert to fraction form
    1,965.95/2,948.24 = 871.08/x
  3. Step 3: Cross multiply
    1,965.95x = 2,948.24 × 871.08
  4. Step 4: Simplify right side
    1,965.95x = 2,568,152.90
  5. Step 5: Solve for x
    x = 2,568,152.90/1,965.95
  6. Step 6: Final answer
    x = 1,306.32

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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.