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Finding the Fourth Proportional to 638, 956.43 and 363.70

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Solution

The fourth proportional to 638, 956.43 and 363.70 is: 545.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    638 : 956.43 = 363.70 : x
  2. Step 2: Convert to fraction form
    638/956.43 = 363.70/x
  3. Step 3: Cross multiply
    638x = 956.43 × 363.70
  4. Step 4: Simplify right side
    638x = 347,848.81
  5. Step 5: Solve for x
    x = 347,848.81/638
  6. Step 6: Final answer
    x = 545.22

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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.