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Finding the Fourth Proportional to 295.29, 407.45 and 221.79

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Solution

The fourth proportional to 295.29, 407.45 and 221.79 is: 306.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.29 : 407.45 = 221.79 : x
  2. Step 2: Convert to fraction form
    295.29/407.45 = 221.79/x
  3. Step 3: Cross multiply
    295.29x = 407.45 × 221.79
  4. Step 4: Simplify right side
    295.29x = 90,367.23
  5. Step 5: Solve for x
    x = 90,367.23/295.29
  6. Step 6: Final answer
    x = 306.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.