Home / 4,081.28-6,120.40-1,615.28

Finding the Fourth Proportional to 4,081.28, 6,120.40 and 1,615.28

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Solution

The fourth proportional to 4,081.28, 6,120.40 and 1,615.28 is: 2,422.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,081.28 : 6,120.40 = 1,615.28 : x
  2. Step 2: Convert to fraction form
    4,081.28/6,120.40 = 1,615.28/x
  3. Step 3: Cross multiply
    4,081.28x = 6,120.40 × 1,615.28
  4. Step 4: Simplify right side
    4,081.28x = 9,886,159.71
  5. Step 5: Solve for x
    x = 9,886,159.71/4,081.28
  6. Step 6: Final answer
    x = 2,422.32

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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.