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Finding the Fourth Proportional to 1,855.95, 2,781.53 and 1,659.87

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Solution

The fourth proportional to 1,855.95, 2,781.53 and 1,659.87 is: 2,487.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.95 : 2,781.53 = 1,659.87 : x
  2. Step 2: Convert to fraction form
    1,855.95/2,781.53 = 1,659.87/x
  3. Step 3: Cross multiply
    1,855.95x = 2,781.53 × 1,659.87
  4. Step 4: Simplify right side
    1,855.95x = 4,616,969.90
  5. Step 5: Solve for x
    x = 4,616,969.90/1,855.95
  6. Step 6: Final answer
    x = 2,487.66

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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.