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Finding the Fourth Proportional to 641.07, 960.99 and 366.78

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Solution

The fourth proportional to 641.07, 960.99 and 366.78 is: 549.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.07 : 960.99 = 366.78 : x
  2. Step 2: Convert to fraction form
    641.07/960.99 = 366.78/x
  3. Step 3: Cross multiply
    641.07x = 960.99 × 366.78
  4. Step 4: Simplify right side
    641.07x = 352,471.91
  5. Step 5: Solve for x
    x = 352,471.91/641.07
  6. Step 6: Final answer
    x = 549.82

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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.