Home / 2,631.62-3,947.88-1,170.80

Finding the Fourth Proportional to 2,631.62, 3,947.88 and 1,170.80

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Solution

The fourth proportional to 2,631.62, 3,947.88 and 1,170.80 is: 1,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.62 : 3,947.88 = 1,170.80 : x
  2. Step 2: Convert to fraction form
    2,631.62/3,947.88 = 1,170.80/x
  3. Step 3: Cross multiply
    2,631.62x = 3,947.88 × 1,170.80
  4. Step 4: Simplify right side
    2,631.62x = 4,622,177.90
  5. Step 5: Solve for x
    x = 4,622,177.90/2,631.62
  6. Step 6: Final answer
    x = 1,756.40

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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.