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Finding the Fourth Proportional to 387.74, 580.38 and 306.33

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Solution

The fourth proportional to 387.74, 580.38 and 306.33 is: 458.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.74 : 580.38 = 306.33 : x
  2. Step 2: Convert to fraction form
    387.74/580.38 = 306.33/x
  3. Step 3: Cross multiply
    387.74x = 580.38 × 306.33
  4. Step 4: Simplify right side
    387.74x = 177,787.81
  5. Step 5: Solve for x
    x = 177,787.81/387.74
  6. Step 6: Final answer
    x = 458.53

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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.