Home / 2,166.20-2,989.36-1,171.49

Finding the Fourth Proportional to 2,166.20, 2,989.36 and 1,171.49

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Solution

The fourth proportional to 2,166.20, 2,989.36 and 1,171.49 is: 1,616.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.20 : 2,989.36 = 1,171.49 : x
  2. Step 2: Convert to fraction form
    2,166.20/2,989.36 = 1,171.49/x
  3. Step 3: Cross multiply
    2,166.20x = 2,989.36 × 1,171.49
  4. Step 4: Simplify right side
    2,166.20x = 3,501,991.86
  5. Step 5: Solve for x
    x = 3,501,991.86/2,166.20
  6. Step 6: Final answer
    x = 1,616.65

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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.