Home / 2,759.04-4,138.35-811.39

Finding the Fourth Proportional to 2,759.04, 4,138.35 and 811.39

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Solution

The fourth proportional to 2,759.04, 4,138.35 and 811.39 is: 1,217.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.04 : 4,138.35 = 811.39 : x
  2. Step 2: Convert to fraction form
    2,759.04/4,138.35 = 811.39/x
  3. Step 3: Cross multiply
    2,759.04x = 4,138.35 × 811.39
  4. Step 4: Simplify right side
    2,759.04x = 3,357,815.81
  5. Step 5: Solve for x
    x = 3,357,815.81/2,759.04
  6. Step 6: Final answer
    x = 1,217.02

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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.