Home / 2,660.85-3,985.19-1,275.16

Finding the Fourth Proportional to 2,660.85, 3,985.19 and 1,275.16

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Solution

The fourth proportional to 2,660.85, 3,985.19 and 1,275.16 is: 1,909.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.85 : 3,985.19 = 1,275.16 : x
  2. Step 2: Convert to fraction form
    2,660.85/3,985.19 = 1,275.16/x
  3. Step 3: Cross multiply
    2,660.85x = 3,985.19 × 1,275.16
  4. Step 4: Simplify right side
    2,660.85x = 5,081,754.88
  5. Step 5: Solve for x
    x = 5,081,754.88/2,660.85
  6. Step 6: Final answer
    x = 1,909.82

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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.