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Finding the Fourth Proportional to 608.97, 839.83 and 520.79

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Solution

The fourth proportional to 608.97, 839.83 and 520.79 is: 718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.97 : 839.83 = 520.79 : x
  2. Step 2: Convert to fraction form
    608.97/839.83 = 520.79/x
  3. Step 3: Cross multiply
    608.97x = 839.83 × 520.79
  4. Step 4: Simplify right side
    608.97x = 437,369.56
  5. Step 5: Solve for x
    x = 437,369.56/608.97
  6. Step 6: Final answer
    x = 718.21

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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.