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Finding the Fourth Proportional to 846.25, 1,269.94 and 326.68

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Solution

The fourth proportional to 846.25, 1,269.94 and 326.68 is: 490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.25 : 1,269.94 = 326.68 : x
  2. Step 2: Convert to fraction form
    846.25/1,269.94 = 326.68/x
  3. Step 3: Cross multiply
    846.25x = 1,269.94 × 326.68
  4. Step 4: Simplify right side
    846.25x = 414,864.00
  5. Step 5: Solve for x
    x = 414,864.00/846.25
  6. Step 6: Final answer
    x = 490.24

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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.