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Finding the Fourth Proportional to 229.26, 317.88 and 221.55

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Solution

The fourth proportional to 229.26, 317.88 and 221.55 is: 307.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.26 : 317.88 = 221.55 : x
  2. Step 2: Convert to fraction form
    229.26/317.88 = 221.55/x
  3. Step 3: Cross multiply
    229.26x = 317.88 × 221.55
  4. Step 4: Simplify right side
    229.26x = 70,426.31
  5. Step 5: Solve for x
    x = 70,426.31/229.26
  6. Step 6: Final answer
    x = 307.19

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.