Home / 1,320.85-1,981.71-443.44

Finding the Fourth Proportional to 1,320.85, 1,981.71 and 443.44

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Solution

The fourth proportional to 1,320.85, 1,981.71 and 443.44 is: 665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.85 : 1,981.71 = 443.44 : x
  2. Step 2: Convert to fraction form
    1,320.85/1,981.71 = 443.44/x
  3. Step 3: Cross multiply
    1,320.85x = 1,981.71 × 443.44
  4. Step 4: Simplify right side
    1,320.85x = 878,764.53
  5. Step 5: Solve for x
    x = 878,764.53/1,320.85
  6. Step 6: Final answer
    x = 665.30

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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.