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Finding the Fourth Proportional to 2,568.32, 3,851.66 and 718.95

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Solution

The fourth proportional to 2,568.32, 3,851.66 and 718.95 is: 1,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,568.32 : 3,851.66 = 718.95 : x
  2. Step 2: Convert to fraction form
    2,568.32/3,851.66 = 718.95/x
  3. Step 3: Cross multiply
    2,568.32x = 3,851.66 × 718.95
  4. Step 4: Simplify right side
    2,568.32x = 2,769,152.75
  5. Step 5: Solve for x
    x = 2,769,152.75/2,568.32
  6. Step 6: Final answer
    x = 1,078.20

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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.