Home / 2,991.20-4,128.96-1,732.84

Finding the Fourth Proportional to 2,991.20, 4,128.96 and 1,732.84

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Solution

The fourth proportional to 2,991.20, 4,128.96 and 1,732.84 is: 2,391.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.20 : 4,128.96 = 1,732.84 : x
  2. Step 2: Convert to fraction form
    2,991.20/4,128.96 = 1,732.84/x
  3. Step 3: Cross multiply
    2,991.20x = 4,128.96 × 1,732.84
  4. Step 4: Simplify right side
    2,991.20x = 7,154,827.05
  5. Step 5: Solve for x
    x = 7,154,827.05/2,991.20
  6. Step 6: Final answer
    x = 2,391.96

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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.