Home / 3,186.45-4,398.75-2,196.90

Finding the Fourth Proportional to 3,186.45, 4,398.75 and 2,196.90

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Solution

The fourth proportional to 3,186.45, 4,398.75 and 2,196.90 is: 3,032.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.45 : 4,398.75 = 2,196.90 : x
  2. Step 2: Convert to fraction form
    3,186.45/4,398.75 = 2,196.90/x
  3. Step 3: Cross multiply
    3,186.45x = 4,398.75 × 2,196.90
  4. Step 4: Simplify right side
    3,186.45x = 9,663,613.88
  5. Step 5: Solve for x
    x = 9,663,613.88/3,186.45
  6. Step 6: Final answer
    x = 3,032.72

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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.