Home / 1,255.44-1,890.50-911.18

Finding the Fourth Proportional to 1,255.44, 1,890.50 and 911.18

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Solution

The fourth proportional to 1,255.44, 1,890.50 and 911.18 is: 1,372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.44 : 1,890.50 = 911.18 : x
  2. Step 2: Convert to fraction form
    1,255.44/1,890.50 = 911.18/x
  3. Step 3: Cross multiply
    1,255.44x = 1,890.50 × 911.18
  4. Step 4: Simplify right side
    1,255.44x = 1,722,585.79
  5. Step 5: Solve for x
    x = 1,722,585.79/1,255.44
  6. Step 6: Final answer
    x = 1,372.10

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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.