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Finding the Fourth Proportional to 1,719.28, 2,576.89 and 743.32

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Solution

The fourth proportional to 1,719.28, 2,576.89 and 743.32 is: 1,114.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.28 : 2,576.89 = 743.32 : x
  2. Step 2: Convert to fraction form
    1,719.28/2,576.89 = 743.32/x
  3. Step 3: Cross multiply
    1,719.28x = 2,576.89 × 743.32
  4. Step 4: Simplify right side
    1,719.28x = 1,915,453.87
  5. Step 5: Solve for x
    x = 1,915,453.87/1,719.28
  6. Step 6: Final answer
    x = 1,114.10

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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.