Home / 3,780.20-5,215.30-2,287.58

Finding the Fourth Proportional to 3,780.20, 5,215.30 and 2,287.58

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Solution

The fourth proportional to 3,780.20, 5,215.30 and 2,287.58 is: 3,156.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.20 : 5,215.30 = 2,287.58 : x
  2. Step 2: Convert to fraction form
    3,780.20/5,215.30 = 2,287.58/x
  3. Step 3: Cross multiply
    3,780.20x = 5,215.30 × 2,287.58
  4. Step 4: Simplify right side
    3,780.20x = 11,930,384.18
  5. Step 5: Solve for x
    x = 11,930,384.18/3,780.20
  6. Step 6: Final answer
    x = 3,156.02

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1.5x scale

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.