Home / 2,120.91-3,181.65-733.87

Finding the Fourth Proportional to 2,120.91, 3,181.65 and 733.87

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Solution

The fourth proportional to 2,120.91, 3,181.65 and 733.87 is: 1,100.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.91 : 3,181.65 = 733.87 : x
  2. Step 2: Convert to fraction form
    2,120.91/3,181.65 = 733.87/x
  3. Step 3: Cross multiply
    2,120.91x = 3,181.65 × 733.87
  4. Step 4: Simplify right side
    2,120.91x = 2,334,913.82
  5. Step 5: Solve for x
    x = 2,334,913.82/2,120.91
  6. Step 6: Final answer
    x = 1,100.90

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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.