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Finding the Fourth Proportional to 641.90, 961.63 and 367.15

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Solution

The fourth proportional to 641.90, 961.63 and 367.15 is: 550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.90 : 961.63 = 367.15 : x
  2. Step 2: Convert to fraction form
    641.90/961.63 = 367.15/x
  3. Step 3: Cross multiply
    641.90x = 961.63 × 367.15
  4. Step 4: Simplify right side
    641.90x = 353,062.45
  5. Step 5: Solve for x
    x = 353,062.45/641.90
  6. Step 6: Final answer
    x = 550.03

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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.