Home / 1,081.16-1,620.96-422.52

Finding the Fourth Proportional to 1,081.16, 1,620.96 and 422.52

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Solution

The fourth proportional to 1,081.16, 1,620.96 and 422.52 is: 633.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.16 : 1,620.96 = 422.52 : x
  2. Step 2: Convert to fraction form
    1,081.16/1,620.96 = 422.52/x
  3. Step 3: Cross multiply
    1,081.16x = 1,620.96 × 422.52
  4. Step 4: Simplify right side
    1,081.16x = 684,888.02
  5. Step 5: Solve for x
    x = 684,888.02/1,081.16
  6. Step 6: Final answer
    x = 633.48

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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.