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Finding the Fourth Proportional to 1,448.76, 2,171.22 and 871.80

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Solution

The fourth proportional to 1,448.76, 2,171.22 and 871.80 is: 1,306.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.76 : 2,171.22 = 871.80 : x
  2. Step 2: Convert to fraction form
    1,448.76/2,171.22 = 871.80/x
  3. Step 3: Cross multiply
    1,448.76x = 2,171.22 × 871.80
  4. Step 4: Simplify right side
    1,448.76x = 1,892,869.60
  5. Step 5: Solve for x
    x = 1,892,869.60/1,448.76
  6. Step 6: Final answer
    x = 1,306.54

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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.