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Finding the Fourth Proportional to 2,154.38, 3,231.56 and 615.38

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Solution

The fourth proportional to 2,154.38, 3,231.56 and 615.38 is: 923.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.38 : 3,231.56 = 615.38 : x
  2. Step 2: Convert to fraction form
    2,154.38/3,231.56 = 615.38/x
  3. Step 3: Cross multiply
    2,154.38x = 3,231.56 × 615.38
  4. Step 4: Simplify right side
    2,154.38x = 1,988,622.77
  5. Step 5: Solve for x
    x = 1,988,622.77/2,154.38
  6. Step 6: Final answer
    x = 923.06

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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.