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Finding the Fourth Proportional to 1,147.87, 1,579.95 and 959.23

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Solution

The fourth proportional to 1,147.87, 1,579.95 and 959.23 is: 1,320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.87 : 1,579.95 = 959.23 : x
  2. Step 2: Convert to fraction form
    1,147.87/1,579.95 = 959.23/x
  3. Step 3: Cross multiply
    1,147.87x = 1,579.95 × 959.23
  4. Step 4: Simplify right side
    1,147.87x = 1,515,535.44
  5. Step 5: Solve for x
    x = 1,515,535.44/1,147.87
  6. Step 6: Final answer
    x = 1,320.30

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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.