Home / 1,273.32-1,917.62-1,120.91

Finding the Fourth Proportional to 1,273.32, 1,917.62 and 1,120.91

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Solution

The fourth proportional to 1,273.32, 1,917.62 and 1,120.91 is: 1,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.32 : 1,917.62 = 1,120.91 : x
  2. Step 2: Convert to fraction form
    1,273.32/1,917.62 = 1,120.91/x
  3. Step 3: Cross multiply
    1,273.32x = 1,917.62 × 1,120.91
  4. Step 4: Simplify right side
    1,273.32x = 2,149,478.62
  5. Step 5: Solve for x
    x = 2,149,478.62/1,273.32
  6. Step 6: Final answer
    x = 1,688.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.