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Finding the Fourth Proportional to 421.48, 580.98 and 265.96

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Solution

The fourth proportional to 421.48, 580.98 and 265.96 is: 366.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.48 : 580.98 = 265.96 : x
  2. Step 2: Convert to fraction form
    421.48/580.98 = 265.96/x
  3. Step 3: Cross multiply
    421.48x = 580.98 × 265.96
  4. Step 4: Simplify right side
    421.48x = 154,517.44
  5. Step 5: Solve for x
    x = 154,517.44/421.48
  6. Step 6: Final answer
    x = 366.61

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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.