Home / 2,740.25-3,781.77-1,561.70

Finding the Fourth Proportional to 2,740.25, 3,781.77 and 1,561.70

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Solution

The fourth proportional to 2,740.25, 3,781.77 and 1,561.70 is: 2,155.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.25 : 3,781.77 = 1,561.70 : x
  2. Step 2: Convert to fraction form
    2,740.25/3,781.77 = 1,561.70/x
  3. Step 3: Cross multiply
    2,740.25x = 3,781.77 × 1,561.70
  4. Step 4: Simplify right side
    2,740.25x = 5,905,990.21
  5. Step 5: Solve for x
    x = 5,905,990.21/2,740.25
  6. Step 6: Final answer
    x = 2,155.27

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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.