Home / 2,142.08-3,208.96-1,214.76

Finding the Fourth Proportional to 2,142.08, 3,208.96 and 1,214.76

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Solution

The fourth proportional to 2,142.08, 3,208.96 and 1,214.76 is: 1,819.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.08 : 3,208.96 = 1,214.76 : x
  2. Step 2: Convert to fraction form
    2,142.08/3,208.96 = 1,214.76/x
  3. Step 3: Cross multiply
    2,142.08x = 3,208.96 × 1,214.76
  4. Step 4: Simplify right side
    2,142.08x = 3,898,116.25
  5. Step 5: Solve for x
    x = 3,898,116.25/2,142.08
  6. Step 6: Final answer
    x = 1,819.78

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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.