Home / 2,725.35-4,086.80-777.09

Finding the Fourth Proportional to 2,725.35, 4,086.80 and 777.09

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Solution

The fourth proportional to 2,725.35, 4,086.80 and 777.09 is: 1,165.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,725.35 : 4,086.80 = 777.09 : x
  2. Step 2: Convert to fraction form
    2,725.35/4,086.80 = 777.09/x
  3. Step 3: Cross multiply
    2,725.35x = 4,086.80 × 777.09
  4. Step 4: Simplify right side
    2,725.35x = 3,175,787.09
  5. Step 5: Solve for x
    x = 3,175,787.09/2,725.35
  6. Step 6: Final answer
    x = 1,165.28

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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.