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Finding the Fourth Proportional to 1,098.26, 1,647.95 and 481.81

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Solution

The fourth proportional to 1,098.26, 1,647.95 and 481.81 is: 722.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.26 : 1,647.95 = 481.81 : x
  2. Step 2: Convert to fraction form
    1,098.26/1,647.95 = 481.81/x
  3. Step 3: Cross multiply
    1,098.26x = 1,647.95 × 481.81
  4. Step 4: Simplify right side
    1,098.26x = 793,995.87
  5. Step 5: Solve for x
    x = 793,995.87/1,098.26
  6. Step 6: Final answer
    x = 722.96

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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.