Home / 2,277.21-3,141.85-1,392.09

Finding the Fourth Proportional to 2,277.21, 3,141.85 and 1,392.09

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Solution

The fourth proportional to 2,277.21, 3,141.85 and 1,392.09 is: 1,920.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,277.21 : 3,141.85 = 1,392.09 : x
  2. Step 2: Convert to fraction form
    2,277.21/3,141.85 = 1,392.09/x
  3. Step 3: Cross multiply
    2,277.21x = 3,141.85 × 1,392.09
  4. Step 4: Simplify right side
    2,277.21x = 4,373,737.97
  5. Step 5: Solve for x
    x = 4,373,737.97/2,277.21
  6. Step 6: Final answer
    x = 1,920.66

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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.