Home / 1,979.24-2,731.52-1,271.57

Finding the Fourth Proportional to 1,979.24, 2,731.52 and 1,271.57

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Solution

The fourth proportional to 1,979.24, 2,731.52 and 1,271.57 is: 1,754.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.24 : 2,731.52 = 1,271.57 : x
  2. Step 2: Convert to fraction form
    1,979.24/2,731.52 = 1,271.57/x
  3. Step 3: Cross multiply
    1,979.24x = 2,731.52 × 1,271.57
  4. Step 4: Simplify right side
    1,979.24x = 3,473,308.41
  5. Step 5: Solve for x
    x = 3,473,308.41/1,979.24
  6. Step 6: Final answer
    x = 1,754.87

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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.