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Finding the Fourth Proportional to 1,813.70, 2,720.49 and 581.19

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Solution

The fourth proportional to 1,813.70, 2,720.49 and 581.19 is: 871.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.70 : 2,720.49 = 581.19 : x
  2. Step 2: Convert to fraction form
    1,813.70/2,720.49 = 581.19/x
  3. Step 3: Cross multiply
    1,813.70x = 2,720.49 × 581.19
  4. Step 4: Simplify right side
    1,813.70x = 1,581,121.58
  5. Step 5: Solve for x
    x = 1,581,121.58/1,813.70
  6. Step 6: Final answer
    x = 871.77

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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.