Home / 2,109.20-2,910.68-1,177.68

Finding the Fourth Proportional to 2,109.20, 2,910.68 and 1,177.68

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Solution

The fourth proportional to 2,109.20, 2,910.68 and 1,177.68 is: 1,625.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.20 : 2,910.68 = 1,177.68 : x
  2. Step 2: Convert to fraction form
    2,109.20/2,910.68 = 1,177.68/x
  3. Step 3: Cross multiply
    2,109.20x = 2,910.68 × 1,177.68
  4. Step 4: Simplify right side
    2,109.20x = 3,427,849.62
  5. Step 5: Solve for x
    x = 3,427,849.62/2,109.20
  6. Step 6: Final answer
    x = 1,625.19

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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.