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Finding the Fourth Proportional to 846.12, 1,268.86 and 268.68

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Solution

The fourth proportional to 846.12, 1,268.86 and 268.68 is: 402.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.12 : 1,268.86 = 268.68 : x
  2. Step 2: Convert to fraction form
    846.12/1,268.86 = 268.68/x
  3. Step 3: Cross multiply
    846.12x = 1,268.86 × 268.68
  4. Step 4: Simplify right side
    846.12x = 340,917.30
  5. Step 5: Solve for x
    x = 340,917.30/846.12
  6. Step 6: Final answer
    x = 402.92

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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.