Home / 3,187.67-4,781.55-1,338.80

Finding the Fourth Proportional to 3,187.67, 4,781.55 and 1,338.80

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Solution

The fourth proportional to 3,187.67, 4,781.55 and 1,338.80 is: 2,008.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.67 : 4,781.55 = 1,338.80 : x
  2. Step 2: Convert to fraction form
    3,187.67/4,781.55 = 1,338.80/x
  3. Step 3: Cross multiply
    3,187.67x = 4,781.55 × 1,338.80
  4. Step 4: Simplify right side
    3,187.67x = 6,401,539.14
  5. Step 5: Solve for x
    x = 6,401,539.14/3,187.67
  6. Step 6: Final answer
    x = 2,008.22

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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.