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Finding the Fourth Proportional to 3,959.86, 5,462.21 and 2,615.48

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Solution

The fourth proportional to 3,959.86, 5,462.21 and 2,615.48 is: 3,607.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.86 : 5,462.21 = 2,615.48 : x
  2. Step 2: Convert to fraction form
    3,959.86/5,462.21 = 2,615.48/x
  3. Step 3: Cross multiply
    3,959.86x = 5,462.21 × 2,615.48
  4. Step 4: Simplify right side
    3,959.86x = 14,286,273.70
  5. Step 5: Solve for x
    x = 14,286,273.70/3,959.86
  6. Step 6: Final answer
    x = 3,607.78

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1.5x scale

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.