Home / 2,120.94-3,177.99-1,147.50

Finding the Fourth Proportional to 2,120.94, 3,177.99 and 1,147.50

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Solution

The fourth proportional to 2,120.94, 3,177.99 and 1,147.50 is: 1,719.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.94 : 3,177.99 = 1,147.50 : x
  2. Step 2: Convert to fraction form
    2,120.94/3,177.99 = 1,147.50/x
  3. Step 3: Cross multiply
    2,120.94x = 3,177.99 × 1,147.50
  4. Step 4: Simplify right side
    2,120.94x = 3,646,743.53
  5. Step 5: Solve for x
    x = 3,646,743.53/2,120.94
  6. Step 6: Final answer
    x = 1,719.40

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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.