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Finding the Fourth Proportional to 1,871.28, 2,812.05 and 1,749.38

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Solution

The fourth proportional to 1,871.28, 2,812.05 and 1,749.38 is: 2,628.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.28 : 2,812.05 = 1,749.38 : x
  2. Step 2: Convert to fraction form
    1,871.28/2,812.05 = 1,749.38/x
  3. Step 3: Cross multiply
    1,871.28x = 2,812.05 × 1,749.38
  4. Step 4: Simplify right side
    1,871.28x = 4,919,329.97
  5. Step 5: Solve for x
    x = 4,919,329.97/1,871.28
  6. Step 6: Final answer
    x = 2,628.86

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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.