Home / 1,271.68-1,758.18-977.92

Finding the Fourth Proportional to 1,271.68, 1,758.18 and 977.92

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Solution

The fourth proportional to 1,271.68, 1,758.18 and 977.92 is: 1,352.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.68 : 1,758.18 = 977.92 : x
  2. Step 2: Convert to fraction form
    1,271.68/1,758.18 = 977.92/x
  3. Step 3: Cross multiply
    1,271.68x = 1,758.18 × 977.92
  4. Step 4: Simplify right side
    1,271.68x = 1,719,359.39
  5. Step 5: Solve for x
    x = 1,719,359.39/1,271.68
  6. Step 6: Final answer
    x = 1,352.04

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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.