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Finding the Fourth Proportional to 1,145.28, 1,716.06 and 871.04

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Solution

The fourth proportional to 1,145.28, 1,716.06 and 871.04 is: 1,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.28 : 1,716.06 = 871.04 : x
  2. Step 2: Convert to fraction form
    1,145.28/1,716.06 = 871.04/x
  3. Step 3: Cross multiply
    1,145.28x = 1,716.06 × 871.04
  4. Step 4: Simplify right side
    1,145.28x = 1,494,756.90
  5. Step 5: Solve for x
    x = 1,494,756.90/1,145.28
  6. Step 6: Final answer
    x = 1,305.15

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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.