Home / 1,265.96-1,747.16-911.78

Finding the Fourth Proportional to 1,265.96, 1,747.16 and 911.78

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Solution

The fourth proportional to 1,265.96, 1,747.16 and 911.78 is: 1,258.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.96 : 1,747.16 = 911.78 : x
  2. Step 2: Convert to fraction form
    1,265.96/1,747.16 = 911.78/x
  3. Step 3: Cross multiply
    1,265.96x = 1,747.16 × 911.78
  4. Step 4: Simplify right side
    1,265.96x = 1,593,025.54
  5. Step 5: Solve for x
    x = 1,593,025.54/1,265.96
  6. Step 6: Final answer
    x = 1,258.35

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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.