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Finding the Fourth Proportional to 1,855.36, 2,781.02 and 758.42

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Solution

The fourth proportional to 1,855.36, 2,781.02 and 758.42 is: 1,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.36 : 2,781.02 = 758.42 : x
  2. Step 2: Convert to fraction form
    1,855.36/2,781.02 = 758.42/x
  3. Step 3: Cross multiply
    1,855.36x = 2,781.02 × 758.42
  4. Step 4: Simplify right side
    1,855.36x = 2,109,177.40
  5. Step 5: Solve for x
    x = 2,109,177.40/1,855.36
  6. Step 6: Final answer
    x = 1,136.80

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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.