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Finding the Fourth Proportional to 1,871.80, 2,805.42 and 1,324.14

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Solution

The fourth proportional to 1,871.80, 2,805.42 and 1,324.14 is: 1,984.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.80 : 2,805.42 = 1,324.14 : x
  2. Step 2: Convert to fraction form
    1,871.80/2,805.42 = 1,324.14/x
  3. Step 3: Cross multiply
    1,871.80x = 2,805.42 × 1,324.14
  4. Step 4: Simplify right side
    1,871.80x = 3,714,748.19
  5. Step 5: Solve for x
    x = 3,714,748.19/1,871.80
  6. Step 6: Final answer
    x = 1,984.59

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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.