Home / 1,081.12-1,621.55-301.18

Finding the Fourth Proportional to 1,081.12, 1,621.55 and 301.18

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Solution

The fourth proportional to 1,081.12, 1,621.55 and 301.18 is: 451.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.12 : 1,621.55 = 301.18 : x
  2. Step 2: Convert to fraction form
    1,081.12/1,621.55 = 301.18/x
  3. Step 3: Cross multiply
    1,081.12x = 1,621.55 × 301.18
  4. Step 4: Simplify right side
    1,081.12x = 488,376.92
  5. Step 5: Solve for x
    x = 488,376.92/1,081.12
  6. Step 6: Final answer
    x = 451.73

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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.