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Finding the Fourth Proportional to 2,463, 3,689.56 and 2,155.20

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Solution

The fourth proportional to 2,463, 3,689.56 and 2,155.20 is: 3,228.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,463 : 3,689.56 = 2,155.20 : x
  2. Step 2: Convert to fraction form
    2,463/3,689.56 = 2,155.20/x
  3. Step 3: Cross multiply
    2,463x = 3,689.56 × 2,155.20
  4. Step 4: Simplify right side
    2,463x = 7,951,739.71
  5. Step 5: Solve for x
    x = 7,951,739.71/2,463
  6. Step 6: Final answer
    x = 3,228.48

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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.