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Finding the Fourth Proportional to 1,908.52, 2,860.20 and 1,214.08

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Solution

The fourth proportional to 1,908.52, 2,860.20 and 1,214.08 is: 1,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.52 : 2,860.20 = 1,214.08 : x
  2. Step 2: Convert to fraction form
    1,908.52/2,860.20 = 1,214.08/x
  3. Step 3: Cross multiply
    1,908.52x = 2,860.20 × 1,214.08
  4. Step 4: Simplify right side
    1,908.52x = 3,472,511.62
  5. Step 5: Solve for x
    x = 3,472,511.62/1,908.52
  6. Step 6: Final answer
    x = 1,819.48

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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.