Home / 1,086.11-1,629.09-306.10

Finding the Fourth Proportional to 1,086.11, 1,629.09 and 306.10

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Solution

The fourth proportional to 1,086.11, 1,629.09 and 306.10 is: 459.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.11 : 1,629.09 = 306.10 : x
  2. Step 2: Convert to fraction form
    1,086.11/1,629.09 = 306.10/x
  3. Step 3: Cross multiply
    1,086.11x = 1,629.09 × 306.10
  4. Step 4: Simplify right side
    1,086.11x = 498,664.45
  5. Step 5: Solve for x
    x = 498,664.45/1,086.11
  6. Step 6: Final answer
    x = 459.13

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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.