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Finding the Fourth Proportional to 295.63, 407.81 and 221.92

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Solution

The fourth proportional to 295.63, 407.81 and 221.92 is: 306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.63 : 407.81 = 221.92 : x
  2. Step 2: Convert to fraction form
    295.63/407.81 = 221.92/x
  3. Step 3: Cross multiply
    295.63x = 407.81 × 221.92
  4. Step 4: Simplify right side
    295.63x = 90,501.20
  5. Step 5: Solve for x
    x = 90,501.20/295.63
  6. Step 6: Final answer
    x = 306.13

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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.