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Finding the Fourth Proportional to 2,719.78, 4,077.68 and 869.83

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Solution

The fourth proportional to 2,719.78, 4,077.68 and 869.83 is: 1,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.78 : 4,077.68 = 869.83 : x
  2. Step 2: Convert to fraction form
    2,719.78/4,077.68 = 869.83/x
  3. Step 3: Cross multiply
    2,719.78x = 4,077.68 × 869.83
  4. Step 4: Simplify right side
    2,719.78x = 3,546,884.05
  5. Step 5: Solve for x
    x = 3,546,884.05/2,719.78
  6. Step 6: Final answer
    x = 1,304.11

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1.5x scale

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.