Home / 1,297.15-1,791.26-945.11

Finding the Fourth Proportional to 1,297.15, 1,791.26 and 945.11

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Solution

The fourth proportional to 1,297.15, 1,791.26 and 945.11 is: 1,305.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.15 : 1,791.26 = 945.11 : x
  2. Step 2: Convert to fraction form
    1,297.15/1,791.26 = 945.11/x
  3. Step 3: Cross multiply
    1,297.15x = 1,791.26 × 945.11
  4. Step 4: Simplify right side
    1,297.15x = 1,692,930.96
  5. Step 5: Solve for x
    x = 1,692,930.96/1,297.15
  6. Step 6: Final answer
    x = 1,305.11

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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.