Home / 1,288.02-1,932.22-422.12

Finding the Fourth Proportional to 1,288.02, 1,932.22 and 422.12

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Solution

The fourth proportional to 1,288.02, 1,932.22 and 422.12 is: 633.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.02 : 1,932.22 = 422.12 : x
  2. Step 2: Convert to fraction form
    1,288.02/1,932.22 = 422.12/x
  3. Step 3: Cross multiply
    1,288.02x = 1,932.22 × 422.12
  4. Step 4: Simplify right side
    1,288.02x = 815,628.71
  5. Step 5: Solve for x
    x = 815,628.71/1,288.02
  6. Step 6: Final answer
    x = 633.24

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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.