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Finding the Fourth Proportional to 421.29, 581.33 and 234.76

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Solution

The fourth proportional to 421.29, 581.33 and 234.76 is: 323.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.29 : 581.33 = 234.76 : x
  2. Step 2: Convert to fraction form
    421.29/581.33 = 234.76/x
  3. Step 3: Cross multiply
    421.29x = 581.33 × 234.76
  4. Step 4: Simplify right side
    421.29x = 136,471.93
  5. Step 5: Solve for x
    x = 136,471.93/421.29
  6. Step 6: Final answer
    x = 323.94

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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.