Home / 1,098.20-1,647.53-481.79

Finding the Fourth Proportional to 1,098.20, 1,647.53 and 481.79

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Solution

The fourth proportional to 1,098.20, 1,647.53 and 481.79 is: 722.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.20 : 1,647.53 = 481.79 : x
  2. Step 2: Convert to fraction form
    1,098.20/1,647.53 = 481.79/x
  3. Step 3: Cross multiply
    1,098.20x = 1,647.53 × 481.79
  4. Step 4: Simplify right side
    1,098.20x = 793,763.48
  5. Step 5: Solve for x
    x = 793,763.48/1,098.20
  6. Step 6: Final answer
    x = 722.79

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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.