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Finding the Fourth Proportional to 638.79, 958.52 and 365.41

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Solution

The fourth proportional to 638.79, 958.52 and 365.41 is: 548.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.79 : 958.52 = 365.41 : x
  2. Step 2: Convert to fraction form
    638.79/958.52 = 365.41/x
  3. Step 3: Cross multiply
    638.79x = 958.52 × 365.41
  4. Step 4: Simplify right side
    638.79x = 350,254.39
  5. Step 5: Solve for x
    x = 350,254.39/638.79
  6. Step 6: Final answer
    x = 548.31

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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.