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Finding the Fourth Proportional to 1,720.14, 2,581.23 and 732.90

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Solution

The fourth proportional to 1,720.14, 2,581.23 and 732.90 is: 1,099.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.14 : 2,581.23 = 732.90 : x
  2. Step 2: Convert to fraction form
    1,720.14/2,581.23 = 732.90/x
  3. Step 3: Cross multiply
    1,720.14x = 2,581.23 × 732.90
  4. Step 4: Simplify right side
    1,720.14x = 1,891,783.47
  5. Step 5: Solve for x
    x = 1,891,783.47/1,720.14
  6. Step 6: Final answer
    x = 1,099.78

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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.