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Finding the Fourth Proportional to 2,445.78, 3,665.97 and 963.90

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Solution

The fourth proportional to 2,445.78, 3,665.97 and 963.90 is: 1,444.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.78 : 3,665.97 = 963.90 : x
  2. Step 2: Convert to fraction form
    2,445.78/3,665.97 = 963.90/x
  3. Step 3: Cross multiply
    2,445.78x = 3,665.97 × 963.90
  4. Step 4: Simplify right side
    2,445.78x = 3,533,628.48
  5. Step 5: Solve for x
    x = 3,533,628.48/2,445.78
  6. Step 6: Final answer
    x = 1,444.79

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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.