Home / 2,169.18-2,991.87-1,609.47

Finding the Fourth Proportional to 2,169.18, 2,991.87 and 1,609.47

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Solution

The fourth proportional to 2,169.18, 2,991.87 and 1,609.47 is: 2,219.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.18 : 2,991.87 = 1,609.47 : x
  2. Step 2: Convert to fraction form
    2,169.18/2,991.87 = 1,609.47/x
  3. Step 3: Cross multiply
    2,169.18x = 2,991.87 × 1,609.47
  4. Step 4: Simplify right side
    2,169.18x = 4,815,325.01
  5. Step 5: Solve for x
    x = 4,815,325.01/2,169.18
  6. Step 6: Final answer
    x = 2,219.88

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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.