Home / 2,451.78-3,381.66-1,555.79

Finding the Fourth Proportional to 2,451.78, 3,381.66 and 1,555.79

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Solution

The fourth proportional to 2,451.78, 3,381.66 and 1,555.79 is: 2,145.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,451.78 : 3,381.66 = 1,555.79 : x
  2. Step 2: Convert to fraction form
    2,451.78/3,381.66 = 1,555.79/x
  3. Step 3: Cross multiply
    2,451.78x = 3,381.66 × 1,555.79
  4. Step 4: Simplify right side
    2,451.78x = 5,261,135.90
  5. Step 5: Solve for x
    x = 5,261,135.90/2,451.78
  6. Step 6: Final answer
    x = 2,145.84

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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.