Home / 1,257.62-1,734.90-1,091.60

Finding the Fourth Proportional to 1,257.62, 1,734.90 and 1,091.60

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Solution

The fourth proportional to 1,257.62, 1,734.90 and 1,091.60 is: 1,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.62 : 1,734.90 = 1,091.60 : x
  2. Step 2: Convert to fraction form
    1,257.62/1,734.90 = 1,091.60/x
  3. Step 3: Cross multiply
    1,257.62x = 1,734.90 × 1,091.60
  4. Step 4: Simplify right side
    1,257.62x = 1,893,816.84
  5. Step 5: Solve for x
    x = 1,893,816.84/1,257.62
  6. Step 6: Final answer
    x = 1,505.87

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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.