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Finding the Fourth Proportional to 608.11, 839.55 and 442.15

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Solution

The fourth proportional to 608.11, 839.55 and 442.15 is: 610.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.11 : 839.55 = 442.15 : x
  2. Step 2: Convert to fraction form
    608.11/839.55 = 442.15/x
  3. Step 3: Cross multiply
    608.11x = 839.55 × 442.15
  4. Step 4: Simplify right side
    608.11x = 371,207.03
  5. Step 5: Solve for x
    x = 371,207.03/608.11
  6. Step 6: Final answer
    x = 610.43

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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.