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Finding the Fourth Proportional to 2,154.04, 3,231.18 and 615

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Solution

The fourth proportional to 2,154.04, 3,231.18 and 615 is: 922.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.04 : 3,231.18 = 615 : x
  2. Step 2: Convert to fraction form
    2,154.04/3,231.18 = 615/x
  3. Step 3: Cross multiply
    2,154.04x = 3,231.18 × 615
  4. Step 4: Simplify right side
    2,154.04x = 1,987,175.70
  5. Step 5: Solve for x
    x = 1,987,175.70/2,154.04
  6. Step 6: Final answer
    x = 922.53

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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.