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Finding the Fourth Proportional to 421.17, 581.25 and 234.73

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Solution

The fourth proportional to 421.17, 581.25 and 234.73 is: 323.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.17 : 581.25 = 234.73 : x
  2. Step 2: Convert to fraction form
    421.17/581.25 = 234.73/x
  3. Step 3: Cross multiply
    421.17x = 581.25 × 234.73
  4. Step 4: Simplify right side
    421.17x = 136,436.81
  5. Step 5: Solve for x
    x = 136,436.81/421.17
  6. Step 6: Final answer
    x = 323.95

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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.