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Finding the Fourth Proportional to 626, 938.36 and 261

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Solution

The fourth proportional to 626, 938.36 and 261 is: 391.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    626 : 938.36 = 261 : x
  2. Step 2: Convert to fraction form
    626/938.36 = 261/x
  3. Step 3: Cross multiply
    626x = 938.36 × 261
  4. Step 4: Simplify right side
    626x = 244,911.96
  5. Step 5: Solve for x
    x = 244,911.96/626
  6. Step 6: Final answer
    x = 391.23

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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.