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Finding the Fourth Proportional to 811.52, 1,217.16 and 226.58

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Solution

The fourth proportional to 811.52, 1,217.16 and 226.58 is: 339.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.52 : 1,217.16 = 226.58 : x
  2. Step 2: Convert to fraction form
    811.52/1,217.16 = 226.58/x
  3. Step 3: Cross multiply
    811.52x = 1,217.16 × 226.58
  4. Step 4: Simplify right side
    811.52x = 275,784.11
  5. Step 5: Solve for x
    x = 275,784.11/811.52
  6. Step 6: Final answer
    x = 339.84

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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.