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Finding the Fourth Proportional to 608.21, 839.30 and 342.66

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Solution

The fourth proportional to 608.21, 839.30 and 342.66 is: 472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.21 : 839.30 = 342.66 : x
  2. Step 2: Convert to fraction form
    608.21/839.30 = 342.66/x
  3. Step 3: Cross multiply
    608.21x = 839.30 × 342.66
  4. Step 4: Simplify right side
    608.21x = 287,594.54
  5. Step 5: Solve for x
    x = 287,594.54/608.21
  6. Step 6: Final answer
    x = 472.85

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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.