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Finding the Fourth Proportional to 608.14, 839.90 and 411.31

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Solution

The fourth proportional to 608.14, 839.90 and 411.31 is: 568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.14 : 839.90 = 411.31 : x
  2. Step 2: Convert to fraction form
    608.14/839.90 = 411.31/x
  3. Step 3: Cross multiply
    608.14x = 839.90 × 411.31
  4. Step 4: Simplify right side
    608.14x = 345,461.35
  5. Step 5: Solve for x
    x = 345,461.35/608.14
  6. Step 6: Final answer
    x = 568.06

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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.