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Finding the Fourth Proportional to 2,719.74, 4,079.22 and 772.10

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Solution

The fourth proportional to 2,719.74, 4,079.22 and 772.10 is: 1,158.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.74 : 4,079.22 = 772.10 : x
  2. Step 2: Convert to fraction form
    2,719.74/4,079.22 = 772.10/x
  3. Step 3: Cross multiply
    2,719.74x = 4,079.22 × 772.10
  4. Step 4: Simplify right side
    2,719.74x = 3,149,565.76
  5. Step 5: Solve for x
    x = 3,149,565.76/2,719.74
  6. Step 6: Final answer
    x = 1,158.04

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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.