Home / 1,288.24-1,932.68-422.60

Finding the Fourth Proportional to 1,288.24, 1,932.68 and 422.60

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Solution

The fourth proportional to 1,288.24, 1,932.68 and 422.60 is: 634.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.24 : 1,932.68 = 422.60 : x
  2. Step 2: Convert to fraction form
    1,288.24/1,932.68 = 422.60/x
  3. Step 3: Cross multiply
    1,288.24x = 1,932.68 × 422.60
  4. Step 4: Simplify right side
    1,288.24x = 816,750.57
  5. Step 5: Solve for x
    x = 816,750.57/1,288.24
  6. Step 6: Final answer
    x = 634.00

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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.