Home / 2,209.05-3,312.45-1,284.80

Finding the Fourth Proportional to 2,209.05, 3,312.45 and 1,284.80

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Solution

The fourth proportional to 2,209.05, 3,312.45 and 1,284.80 is: 1,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.05 : 3,312.45 = 1,284.80 : x
  2. Step 2: Convert to fraction form
    2,209.05/3,312.45 = 1,284.80/x
  3. Step 3: Cross multiply
    2,209.05x = 3,312.45 × 1,284.80
  4. Step 4: Simplify right side
    2,209.05x = 4,255,819.20
  5. Step 5: Solve for x
    x = 4,255,819.20/2,209.05
  6. Step 6: Final answer
    x = 1,926.54

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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.