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Finding the Fourth Proportional to 641.75, 963.65 and 369.06

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Solution

The fourth proportional to 641.75, 963.65 and 369.06 is: 554.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.75 : 963.65 = 369.06 : x
  2. Step 2: Convert to fraction form
    641.75/963.65 = 369.06/x
  3. Step 3: Cross multiply
    641.75x = 963.65 × 369.06
  4. Step 4: Simplify right side
    641.75x = 355,639.90
  5. Step 5: Solve for x
    x = 355,639.90/641.75
  6. Step 6: Final answer
    x = 554.17

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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.