Home / 1,321.43-1,824.48-1,181.12

Finding the Fourth Proportional to 1,321.43, 1,824.48 and 1,181.12

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Solution

The fourth proportional to 1,321.43, 1,824.48 and 1,181.12 is: 1,630.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.43 : 1,824.48 = 1,181.12 : x
  2. Step 2: Convert to fraction form
    1,321.43/1,824.48 = 1,181.12/x
  3. Step 3: Cross multiply
    1,321.43x = 1,824.48 × 1,181.12
  4. Step 4: Simplify right side
    1,321.43x = 2,154,920.70
  5. Step 5: Solve for x
    x = 2,154,920.70/1,321.43
  6. Step 6: Final answer
    x = 1,630.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.