Home / 2,781.38-4,172.90-1,611.11

Finding the Fourth Proportional to 2,781.38, 4,172.90 and 1,611.11

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Solution

The fourth proportional to 2,781.38, 4,172.90 and 1,611.11 is: 2,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.38 : 4,172.90 = 1,611.11 : x
  2. Step 2: Convert to fraction form
    2,781.38/4,172.90 = 1,611.11/x
  3. Step 3: Cross multiply
    2,781.38x = 4,172.90 × 1,611.11
  4. Step 4: Simplify right side
    2,781.38x = 6,722,972.00
  5. Step 5: Solve for x
    x = 6,722,972.00/2,781.38
  6. Step 6: Final answer
    x = 2,417.14

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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.