Home / 3,780.47-5,215.84-2,287.91

Finding the Fourth Proportional to 3,780.47, 5,215.84 and 2,287.91

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Solution

The fourth proportional to 3,780.47, 5,215.84 and 2,287.91 is: 3,156.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.47 : 5,215.84 = 2,287.91 : x
  2. Step 2: Convert to fraction form
    3,780.47/5,215.84 = 2,287.91/x
  3. Step 3: Cross multiply
    3,780.47x = 5,215.84 × 2,287.91
  4. Step 4: Simplify right side
    3,780.47x = 11,933,340.70
  5. Step 5: Solve for x
    x = 11,933,340.70/3,780.47
  6. Step 6: Final answer
    x = 3,156.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.