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Finding the Fourth Proportional to 1,098.68, 1,647.60 and 550.28

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Solution

The fourth proportional to 1,098.68, 1,647.60 and 550.28 is: 825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.68 : 1,647.60 = 550.28 : x
  2. Step 2: Convert to fraction form
    1,098.68/1,647.60 = 550.28/x
  3. Step 3: Cross multiply
    1,098.68x = 1,647.60 × 550.28
  4. Step 4: Simplify right side
    1,098.68x = 906,641.33
  5. Step 5: Solve for x
    x = 906,641.33/1,098.68
  6. Step 6: Final answer
    x = 825.21

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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.