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Finding the Fourth Proportional to 387.27, 580.33 and 263.79

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Solution

The fourth proportional to 387.27, 580.33 and 263.79 is: 395.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.27 : 580.33 = 263.79 : x
  2. Step 2: Convert to fraction form
    387.27/580.33 = 263.79/x
  3. Step 3: Cross multiply
    387.27x = 580.33 × 263.79
  4. Step 4: Simplify right side
    387.27x = 153,085.58
  5. Step 5: Solve for x
    x = 153,085.58/387.27
  6. Step 6: Final answer
    x = 395.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.