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Finding the Fourth Proportional to 2,116.05, 3,174.11 and 655.19

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Solution

The fourth proportional to 2,116.05, 3,174.11 and 655.19 is: 982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.05 : 3,174.11 = 655.19 : x
  2. Step 2: Convert to fraction form
    2,116.05/3,174.11 = 655.19/x
  3. Step 3: Cross multiply
    2,116.05x = 3,174.11 × 655.19
  4. Step 4: Simplify right side
    2,116.05x = 2,079,645.13
  5. Step 5: Solve for x
    x = 2,079,645.13/2,116.05
  6. Step 6: Final answer
    x = 982.80

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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.