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Finding the Fourth Proportional to 1,429.76, 2,144.52 and 660.26

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Solution

The fourth proportional to 1,429.76, 2,144.52 and 660.26 is: 990.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.76 : 2,144.52 = 660.26 : x
  2. Step 2: Convert to fraction form
    1,429.76/2,144.52 = 660.26/x
  3. Step 3: Cross multiply
    1,429.76x = 2,144.52 × 660.26
  4. Step 4: Simplify right side
    1,429.76x = 1,415,940.78
  5. Step 5: Solve for x
    x = 1,415,940.78/1,429.76
  6. Step 6: Final answer
    x = 990.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.