Home / 3,853.79-5,777.17-1,388.05

Finding the Fourth Proportional to 3,853.79, 5,777.17 and 1,388.05

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Solution

The fourth proportional to 3,853.79, 5,777.17 and 1,388.05 is: 2,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.79 : 5,777.17 = 1,388.05 : x
  2. Step 2: Convert to fraction form
    3,853.79/5,777.17 = 1,388.05/x
  3. Step 3: Cross multiply
    3,853.79x = 5,777.17 × 1,388.05
  4. Step 4: Simplify right side
    3,853.79x = 8,019,000.82
  5. Step 5: Solve for x
    x = 8,019,000.82/3,853.79
  6. Step 6: Final answer
    x = 2,080.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.