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Finding the Fourth Proportional to 680.34, 938.19 and 414.66

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Solution

The fourth proportional to 680.34, 938.19 and 414.66 is: 571.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.34 : 938.19 = 414.66 : x
  2. Step 2: Convert to fraction form
    680.34/938.19 = 414.66/x
  3. Step 3: Cross multiply
    680.34x = 938.19 × 414.66
  4. Step 4: Simplify right side
    680.34x = 389,029.87
  5. Step 5: Solve for x
    x = 389,029.87/680.34
  6. Step 6: Final answer
    x = 571.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.