Home / 1,321.15-1,982.07-499.44

Finding the Fourth Proportional to 1,321.15, 1,982.07 and 499.44

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Solution

The fourth proportional to 1,321.15, 1,982.07 and 499.44 is: 749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.15 : 1,982.07 = 499.44 : x
  2. Step 2: Convert to fraction form
    1,321.15/1,982.07 = 499.44/x
  3. Step 3: Cross multiply
    1,321.15x = 1,982.07 × 499.44
  4. Step 4: Simplify right side
    1,321.15x = 989,925.04
  5. Step 5: Solve for x
    x = 989,925.04/1,321.15
  6. Step 6: Final answer
    x = 749.29

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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.