Home / 2,759.07-4,138.67-811.42

Finding the Fourth Proportional to 2,759.07, 4,138.67 and 811.42

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Solution

The fourth proportional to 2,759.07, 4,138.67 and 811.42 is: 1,217.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.07 : 4,138.67 = 811.42 : x
  2. Step 2: Convert to fraction form
    2,759.07/4,138.67 = 811.42/x
  3. Step 3: Cross multiply
    2,759.07x = 4,138.67 × 811.42
  4. Step 4: Simplify right side
    2,759.07x = 3,358,199.61
  5. Step 5: Solve for x
    x = 3,358,199.61/2,759.07
  6. Step 6: Final answer
    x = 1,217.15

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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.