Home / 2,519.12-3,778.14-787.34

Finding the Fourth Proportional to 2,519.12, 3,778.14 and 787.34

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Solution

The fourth proportional to 2,519.12, 3,778.14 and 787.34 is: 1,180.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,519.12 : 3,778.14 = 787.34 : x
  2. Step 2: Convert to fraction form
    2,519.12/3,778.14 = 787.34/x
  3. Step 3: Cross multiply
    2,519.12x = 3,778.14 × 787.34
  4. Step 4: Simplify right side
    2,519.12x = 2,974,680.75
  5. Step 5: Solve for x
    x = 2,974,680.75/2,519.12
  6. Step 6: Final answer
    x = 1,180.84

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1.5x scale

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.