Home / 1,297.90-1,792.61-945.42

Finding the Fourth Proportional to 1,297.90, 1,792.61 and 945.42

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Solution

The fourth proportional to 1,297.90, 1,792.61 and 945.42 is: 1,305.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.90 : 1,792.61 = 945.42 : x
  2. Step 2: Convert to fraction form
    1,297.90/1,792.61 = 945.42/x
  3. Step 3: Cross multiply
    1,297.90x = 1,792.61 × 945.42
  4. Step 4: Simplify right side
    1,297.90x = 1,694,761.44
  5. Step 5: Solve for x
    x = 1,694,761.44/1,297.90
  6. Step 6: Final answer
    x = 1,305.77

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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.