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Finding the Fourth Proportional to 608.54, 839.09 and 500.43

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Solution

The fourth proportional to 608.54, 839.09 and 500.43 is: 690.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.54 : 839.09 = 500.43 : x
  2. Step 2: Convert to fraction form
    608.54/839.09 = 500.43/x
  3. Step 3: Cross multiply
    608.54x = 839.09 × 500.43
  4. Step 4: Simplify right side
    608.54x = 419,903.31
  5. Step 5: Solve for x
    x = 419,903.31/608.54
  6. Step 6: Final answer
    x = 690.02

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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.