Home / 1,819.78-2,512.65-1,426.12

Finding the Fourth Proportional to 1,819.78, 2,512.65 and 1,426.12

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Solution

The fourth proportional to 1,819.78, 2,512.65 and 1,426.12 is: 1,969.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.78 : 2,512.65 = 1,426.12 : x
  2. Step 2: Convert to fraction form
    1,819.78/2,512.65 = 1,426.12/x
  3. Step 3: Cross multiply
    1,819.78x = 2,512.65 × 1,426.12
  4. Step 4: Simplify right side
    1,819.78x = 3,583,340.42
  5. Step 5: Solve for x
    x = 3,583,340.42/1,819.78
  6. Step 6: Final answer
    x = 1,969.11

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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.