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Finding the Fourth Proportional to 2,097.20, 3,145.74 and 537.20

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Solution

The fourth proportional to 2,097.20, 3,145.74 and 537.20 is: 805.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,097.20 : 3,145.74 = 537.20 : x
  2. Step 2: Convert to fraction form
    2,097.20/3,145.74 = 537.20/x
  3. Step 3: Cross multiply
    2,097.20x = 3,145.74 × 537.20
  4. Step 4: Simplify right side
    2,097.20x = 1,689,891.53
  5. Step 5: Solve for x
    x = 1,689,891.53/2,097.20
  6. Step 6: Final answer
    x = 805.78

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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.