Home / 2,729.28-4,085.76-1,615.20

Finding the Fourth Proportional to 2,729.28, 4,085.76 and 1,615.20

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Solution

The fourth proportional to 2,729.28, 4,085.76 and 1,615.20 is: 2,417.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,729.28 : 4,085.76 = 1,615.20 : x
  2. Step 2: Convert to fraction form
    2,729.28/4,085.76 = 1,615.20/x
  3. Step 3: Cross multiply
    2,729.28x = 4,085.76 × 1,615.20
  4. Step 4: Simplify right side
    2,729.28x = 6,599,319.55
  5. Step 5: Solve for x
    x = 6,599,319.55/2,729.28
  6. Step 6: Final answer
    x = 2,417.97

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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.