Home / 1,321.46-1,982.20-499.59

Finding the Fourth Proportional to 1,321.46, 1,982.20 and 499.59

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Solution

The fourth proportional to 1,321.46, 1,982.20 and 499.59 is: 749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.46 : 1,982.20 = 499.59 : x
  2. Step 2: Convert to fraction form
    1,321.46/1,982.20 = 499.59/x
  3. Step 3: Cross multiply
    1,321.46x = 1,982.20 × 499.59
  4. Step 4: Simplify right side
    1,321.46x = 990,291.16
  5. Step 5: Solve for x
    x = 990,291.16/1,321.46
  6. Step 6: Final answer
    x = 749.39

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1.5x scale

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.