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Finding the Fourth Proportional to 608.23, 839.21 and 359.45

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Solution

The fourth proportional to 608.23, 839.21 and 359.45 is: 495.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.23 : 839.21 = 359.45 : x
  2. Step 2: Convert to fraction form
    608.23/839.21 = 359.45/x
  3. Step 3: Cross multiply
    608.23x = 839.21 × 359.45
  4. Step 4: Simplify right side
    608.23x = 301,648.04
  5. Step 5: Solve for x
    x = 301,648.04/608.23
  6. Step 6: Final answer
    x = 495.95

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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.