Home / 3,115.85-4,672.05-1,239.84

Finding the Fourth Proportional to 3,115.85, 4,672.05 and 1,239.84

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Solution

The fourth proportional to 3,115.85, 4,672.05 and 1,239.84 is: 1,859.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.85 : 4,672.05 = 1,239.84 : x
  2. Step 2: Convert to fraction form
    3,115.85/4,672.05 = 1,239.84/x
  3. Step 3: Cross multiply
    3,115.85x = 4,672.05 × 1,239.84
  4. Step 4: Simplify right side
    3,115.85x = 5,792,594.47
  5. Step 5: Solve for x
    x = 5,792,594.47/3,115.85
  6. Step 6: Final answer
    x = 1,859.07

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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.