Home / 1,081.35-1,621.74-301.17

Finding the Fourth Proportional to 1,081.35, 1,621.74 and 301.17

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Solution

The fourth proportional to 1,081.35, 1,621.74 and 301.17 is: 451.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.35 : 1,621.74 = 301.17 : x
  2. Step 2: Convert to fraction form
    1,081.35/1,621.74 = 301.17/x
  3. Step 3: Cross multiply
    1,081.35x = 1,621.74 × 301.17
  4. Step 4: Simplify right side
    1,081.35x = 488,419.44
  5. Step 5: Solve for x
    x = 488,419.44/1,081.35
  6. Step 6: Final answer
    x = 451.68

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Double scale
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1.5x scale

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.