Home / 1,871.28-2,804.79-1,139.24

Finding the Fourth Proportional to 1,871.28, 2,804.79 and 1,139.24

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Solution

The fourth proportional to 1,871.28, 2,804.79 and 1,139.24 is: 1,707.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.28 : 2,804.79 = 1,139.24 : x
  2. Step 2: Convert to fraction form
    1,871.28/2,804.79 = 1,139.24/x
  3. Step 3: Cross multiply
    1,871.28x = 2,804.79 × 1,139.24
  4. Step 4: Simplify right side
    1,871.28x = 3,195,328.96
  5. Step 5: Solve for x
    x = 3,195,328.96/1,871.28
  6. Step 6: Final answer
    x = 1,707.56

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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.