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Finding the Fourth Proportional to 607.97, 839.27 and 387.22

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Solution

The fourth proportional to 607.97, 839.27 and 387.22 is: 534.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.97 : 839.27 = 387.22 : x
  2. Step 2: Convert to fraction form
    607.97/839.27 = 387.22/x
  3. Step 3: Cross multiply
    607.97x = 839.27 × 387.22
  4. Step 4: Simplify right side
    607.97x = 324,982.13
  5. Step 5: Solve for x
    x = 324,982.13/607.97
  6. Step 6: Final answer
    x = 534.54

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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.