Home / 3,780.78-5,219.91-2,438.79

Finding the Fourth Proportional to 3,780.78, 5,219.91 and 2,438.79

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Solution

The fourth proportional to 3,780.78, 5,219.91 and 2,438.79 is: 3,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.78 : 5,219.91 = 2,438.79 : x
  2. Step 2: Convert to fraction form
    3,780.78/5,219.91 = 2,438.79/x
  3. Step 3: Cross multiply
    3,780.78x = 5,219.91 × 2,438.79
  4. Step 4: Simplify right side
    3,780.78x = 12,730,264.31
  5. Step 5: Solve for x
    x = 12,730,264.31/3,780.78
  6. Step 6: Final answer
    x = 3,367.10

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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.