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Finding the Fourth Proportional to 608.28, 839.61 and 398.46

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Solution

The fourth proportional to 608.28, 839.61 and 398.46 is: 550.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.28 : 839.61 = 398.46 : x
  2. Step 2: Convert to fraction form
    608.28/839.61 = 398.46/x
  3. Step 3: Cross multiply
    608.28x = 839.61 × 398.46
  4. Step 4: Simplify right side
    608.28x = 334,551.00
  5. Step 5: Solve for x
    x = 334,551.00/608.28
  6. Step 6: Final answer
    x = 550.00

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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.