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Finding the Fourth Proportional to 387.60, 580.20 and 363.84

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Solution

The fourth proportional to 387.60, 580.20 and 363.84 is: 544.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.60 : 580.20 = 363.84 : x
  2. Step 2: Convert to fraction form
    387.60/580.20 = 363.84/x
  3. Step 3: Cross multiply
    387.60x = 580.20 × 363.84
  4. Step 4: Simplify right side
    387.60x = 211,099.97
  5. Step 5: Solve for x
    x = 211,099.97/387.60
  6. Step 6: Final answer
    x = 544.63

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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.