Home / 2,740.25-3,781.68-1,561.43

Finding the Fourth Proportional to 2,740.25, 3,781.68 and 1,561.43

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Solution

The fourth proportional to 2,740.25, 3,781.68 and 1,561.43 is: 2,154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.25 : 3,781.68 = 1,561.43 : x
  2. Step 2: Convert to fraction form
    2,740.25/3,781.68 = 1,561.43/x
  3. Step 3: Cross multiply
    2,740.25x = 3,781.68 × 1,561.43
  4. Step 4: Simplify right side
    2,740.25x = 5,904,828.60
  5. Step 5: Solve for x
    x = 5,904,828.60/2,740.25
  6. Step 6: Final answer
    x = 2,154.85

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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.