Home / 2,987.42-4,122.27-1,660.91

Finding the Fourth Proportional to 2,987.42, 4,122.27 and 1,660.91

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Solution

The fourth proportional to 2,987.42, 4,122.27 and 1,660.91 is: 2,291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.42 : 4,122.27 = 1,660.91 : x
  2. Step 2: Convert to fraction form
    2,987.42/4,122.27 = 1,660.91/x
  3. Step 3: Cross multiply
    2,987.42x = 4,122.27 × 1,660.91
  4. Step 4: Simplify right side
    2,987.42x = 6,846,698.85
  5. Step 5: Solve for x
    x = 6,846,698.85/2,987.42
  6. Step 6: Final answer
    x = 2,291.85

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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.