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Finding the Fourth Proportional to 1,635.78, 2,455.48 and 662.56

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Solution

The fourth proportional to 1,635.78, 2,455.48 and 662.56 is: 994.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.78 : 2,455.48 = 662.56 : x
  2. Step 2: Convert to fraction form
    1,635.78/2,455.48 = 662.56/x
  3. Step 3: Cross multiply
    1,635.78x = 2,455.48 × 662.56
  4. Step 4: Simplify right side
    1,635.78x = 1,626,902.83
  5. Step 5: Solve for x
    x = 1,626,902.83/1,635.78
  6. Step 6: Final answer
    x = 994.57

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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.