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Finding the Fourth Proportional to 1,086.24, 1,486.12 and 1,081.64

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Solution

The fourth proportional to 1,086.24, 1,486.12 and 1,081.64 is: 1,479.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.24 : 1,486.12 = 1,081.64 : x
  2. Step 2: Convert to fraction form
    1,086.24/1,486.12 = 1,081.64/x
  3. Step 3: Cross multiply
    1,086.24x = 1,486.12 × 1,081.64
  4. Step 4: Simplify right side
    1,086.24x = 1,607,446.84
  5. Step 5: Solve for x
    x = 1,607,446.84/1,086.24
  6. Step 6: Final answer
    x = 1,479.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.