Home / 1,540.24-2,124.28-1,042.72

Finding the Fourth Proportional to 1,540.24, 2,124.28 and 1,042.72

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Solution

The fourth proportional to 1,540.24, 2,124.28 and 1,042.72 is: 1,438.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.24 : 2,124.28 = 1,042.72 : x
  2. Step 2: Convert to fraction form
    1,540.24/2,124.28 = 1,042.72/x
  3. Step 3: Cross multiply
    1,540.24x = 2,124.28 × 1,042.72
  4. Step 4: Simplify right side
    1,540.24x = 2,215,029.24
  5. Step 5: Solve for x
    x = 2,215,029.24/1,540.24
  6. Step 6: Final answer
    x = 1,438.11

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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.