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Finding the Fourth Proportional to 625.81, 938.66 and 365.64

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Solution

The fourth proportional to 625.81, 938.66 and 365.64 is: 548.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.81 : 938.66 = 365.64 : x
  2. Step 2: Convert to fraction form
    625.81/938.66 = 365.64/x
  3. Step 3: Cross multiply
    625.81x = 938.66 × 365.64
  4. Step 4: Simplify right side
    625.81x = 343,209.81
  5. Step 5: Solve for x
    x = 343,209.81/625.81
  6. Step 6: Final answer
    x = 548.43

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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.