Home / 1,086.19-1,629.28-306.26

Finding the Fourth Proportional to 1,086.19, 1,629.28 and 306.26

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Solution

The fourth proportional to 1,086.19, 1,629.28 and 306.26 is: 459.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.19 : 1,629.28 = 306.26 : x
  2. Step 2: Convert to fraction form
    1,086.19/1,629.28 = 306.26/x
  3. Step 3: Cross multiply
    1,086.19x = 1,629.28 × 306.26
  4. Step 4: Simplify right side
    1,086.19x = 498,983.29
  5. Step 5: Solve for x
    x = 498,983.29/1,086.19
  6. Step 6: Final answer
    x = 459.39

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Double scale
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Similar ratio
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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.