Home / 2,072.68-2,860.20-1,188.70

Finding the Fourth Proportional to 2,072.68, 2,860.20 and 1,188.70

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Solution

The fourth proportional to 2,072.68, 2,860.20 and 1,188.70 is: 1,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.68 : 2,860.20 = 1,188.70 : x
  2. Step 2: Convert to fraction form
    2,072.68/2,860.20 = 1,188.70/x
  3. Step 3: Cross multiply
    2,072.68x = 2,860.20 × 1,188.70
  4. Step 4: Simplify right side
    2,072.68x = 3,399,919.74
  5. Step 5: Solve for x
    x = 3,399,919.74/2,072.68
  6. Step 6: Final answer
    x = 1,640.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.