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Finding the Fourth Proportional to 1,274.91, 1,759.44 and 959.60

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Solution

The fourth proportional to 1,274.91, 1,759.44 and 959.60 is: 1,324.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.91 : 1,759.44 = 959.60 : x
  2. Step 2: Convert to fraction form
    1,274.91/1,759.44 = 959.60/x
  3. Step 3: Cross multiply
    1,274.91x = 1,759.44 × 959.60
  4. Step 4: Simplify right side
    1,274.91x = 1,688,358.62
  5. Step 5: Solve for x
    x = 1,688,358.62/1,274.91
  6. Step 6: Final answer
    x = 1,324.30

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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.