Home / 3,187.55-4,781.62-1,239.90

Finding the Fourth Proportional to 3,187.55, 4,781.62 and 1,239.90

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Solution

The fourth proportional to 3,187.55, 4,781.62 and 1,239.90 is: 1,859.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.55 : 4,781.62 = 1,239.90 : x
  2. Step 2: Convert to fraction form
    3,187.55/4,781.62 = 1,239.90/x
  3. Step 3: Cross multiply
    3,187.55x = 4,781.62 × 1,239.90
  4. Step 4: Simplify right side
    3,187.55x = 5,928,730.64
  5. Step 5: Solve for x
    x = 5,928,730.64/3,187.55
  6. Step 6: Final answer
    x = 1,859.96

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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.