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Finding the Fourth Proportional to 1,644.78, 2,467.11 and 657.10

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Solution

The fourth proportional to 1,644.78, 2,467.11 and 657.10 is: 985.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.78 : 2,467.11 = 657.10 : x
  2. Step 2: Convert to fraction form
    1,644.78/2,467.11 = 657.10/x
  3. Step 3: Cross multiply
    1,644.78x = 2,467.11 × 657.10
  4. Step 4: Simplify right side
    1,644.78x = 1,621,137.98
  5. Step 5: Solve for x
    x = 1,621,137.98/1,644.78
  6. Step 6: Final answer
    x = 985.63

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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.