Home / 3,780.48-5,215.68-2,385.12

Finding the Fourth Proportional to 3,780.48, 5,215.68 and 2,385.12

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Solution

The fourth proportional to 3,780.48, 5,215.68 and 2,385.12 is: 3,290.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.48 : 5,215.68 = 2,385.12 : x
  2. Step 2: Convert to fraction form
    3,780.48/5,215.68 = 2,385.12/x
  3. Step 3: Cross multiply
    3,780.48x = 5,215.68 × 2,385.12
  4. Step 4: Simplify right side
    3,780.48x = 12,440,022.68
  5. Step 5: Solve for x
    x = 12,440,022.68/3,780.48
  6. Step 6: Final answer
    x = 3,290.59

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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.