Home / 1,540.80-2,311.15-445.28

Finding the Fourth Proportional to 1,540.80, 2,311.15 and 445.28

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Solution

The fourth proportional to 1,540.80, 2,311.15 and 445.28 is: 667.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.80 : 2,311.15 = 445.28 : x
  2. Step 2: Convert to fraction form
    1,540.80/2,311.15 = 445.28/x
  3. Step 3: Cross multiply
    1,540.80x = 2,311.15 × 445.28
  4. Step 4: Simplify right side
    1,540.80x = 1,029,108.87
  5. Step 5: Solve for x
    x = 1,029,108.87/1,540.80
  6. Step 6: Final answer
    x = 667.91

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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.