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Finding the Fourth Proportional to 1,144.48, 1,578.58 and 969.07

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Solution

The fourth proportional to 1,144.48, 1,578.58 and 969.07 is: 1,336.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.48 : 1,578.58 = 969.07 : x
  2. Step 2: Convert to fraction form
    1,144.48/1,578.58 = 969.07/x
  3. Step 3: Cross multiply
    1,144.48x = 1,578.58 × 969.07
  4. Step 4: Simplify right side
    1,144.48x = 1,529,754.52
  5. Step 5: Solve for x
    x = 1,529,754.52/1,144.48
  6. Step 6: Final answer
    x = 1,336.64

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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.