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Finding the Fourth Proportional to 2,147.68, 3,221.48 and 898.95

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Solution

The fourth proportional to 2,147.68, 3,221.48 and 898.95 is: 1,348.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.68 : 3,221.48 = 898.95 : x
  2. Step 2: Convert to fraction form
    2,147.68/3,221.48 = 898.95/x
  3. Step 3: Cross multiply
    2,147.68x = 3,221.48 × 898.95
  4. Step 4: Simplify right side
    2,147.68x = 2,895,963.77
  5. Step 5: Solve for x
    x = 2,895,963.77/2,147.68
  6. Step 6: Final answer
    x = 1,348.41

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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.