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Finding the Fourth Proportional to 679.84, 937.92 and 447.04

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Solution

The fourth proportional to 679.84, 937.92 and 447.04 is: 616.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.84 : 937.92 = 447.04 : x
  2. Step 2: Convert to fraction form
    679.84/937.92 = 447.04/x
  3. Step 3: Cross multiply
    679.84x = 937.92 × 447.04
  4. Step 4: Simplify right side
    679.84x = 419,287.76
  5. Step 5: Solve for x
    x = 419,287.76/679.84
  6. Step 6: Final answer
    x = 616.74

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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.