Home / 2,889.20-3,987.16-1,630.20

Finding the Fourth Proportional to 2,889.20, 3,987.16 and 1,630.20

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Solution

The fourth proportional to 2,889.20, 3,987.16 and 1,630.20 is: 2,249.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.20 : 3,987.16 = 1,630.20 : x
  2. Step 2: Convert to fraction form
    2,889.20/3,987.16 = 1,630.20/x
  3. Step 3: Cross multiply
    2,889.20x = 3,987.16 × 1,630.20
  4. Step 4: Simplify right side
    2,889.20x = 6,499,868.23
  5. Step 5: Solve for x
    x = 6,499,868.23/2,889.20
  6. Step 6: Final answer
    x = 2,249.71

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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.