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Finding the Fourth Proportional to 680.58, 939.21 and 444.63

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Solution

The fourth proportional to 680.58, 939.21 and 444.63 is: 613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.58 : 939.21 = 444.63 : x
  2. Step 2: Convert to fraction form
    680.58/939.21 = 444.63/x
  3. Step 3: Cross multiply
    680.58x = 939.21 × 444.63
  4. Step 4: Simplify right side
    680.58x = 417,600.94
  5. Step 5: Solve for x
    x = 417,600.94/680.58
  6. Step 6: Final answer
    x = 613.60

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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.