Home / 1,871.28-2,581.56-1,172.52

Finding the Fourth Proportional to 1,871.28, 2,581.56 and 1,172.52

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Solution

The fourth proportional to 1,871.28, 2,581.56 and 1,172.52 is: 1,617.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.28 : 2,581.56 = 1,172.52 : x
  2. Step 2: Convert to fraction form
    1,871.28/2,581.56 = 1,172.52/x
  3. Step 3: Cross multiply
    1,871.28x = 2,581.56 × 1,172.52
  4. Step 4: Simplify right side
    1,871.28x = 3,026,930.73
  5. Step 5: Solve for x
    x = 3,026,930.73/1,871.28
  6. Step 6: Final answer
    x = 1,617.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.