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Finding the Fourth Proportional to 1,855.11, 2,781.45 and 759.18

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Solution

The fourth proportional to 1,855.11, 2,781.45 and 759.18 is: 1,138.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.11 : 2,781.45 = 759.18 : x
  2. Step 2: Convert to fraction form
    1,855.11/2,781.45 = 759.18/x
  3. Step 3: Cross multiply
    1,855.11x = 2,781.45 × 759.18
  4. Step 4: Simplify right side
    1,855.11x = 2,111,621.21
  5. Step 5: Solve for x
    x = 2,111,621.21/1,855.11
  6. Step 6: Final answer
    x = 1,138.27

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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.