Home / 1,540.80-2,131.20-1,468.80

Finding the Fourth Proportional to 1,540.80, 2,131.20 and 1,468.80

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Solution

The fourth proportional to 1,540.80, 2,131.20 and 1,468.80 is: 2,031.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.80 : 2,131.20 = 1,468.80 : x
  2. Step 2: Convert to fraction form
    1,540.80/2,131.20 = 1,468.80/x
  3. Step 3: Cross multiply
    1,540.80x = 2,131.20 × 1,468.80
  4. Step 4: Simplify right side
    1,540.80x = 3,130,306.56
  5. Step 5: Solve for x
    x = 3,130,306.56/1,540.80
  6. Step 6: Final answer
    x = 2,031.61

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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.