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Finding the Fourth Proportional to 608.54, 839.63 and 412.31

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Solution

The fourth proportional to 608.54, 839.63 and 412.31 is: 568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.54 : 839.63 = 412.31 : x
  2. Step 2: Convert to fraction form
    608.54/839.63 = 412.31/x
  3. Step 3: Cross multiply
    608.54x = 839.63 × 412.31
  4. Step 4: Simplify right side
    608.54x = 346,190.98
  5. Step 5: Solve for x
    x = 346,190.98/608.54
  6. Step 6: Final answer
    x = 568.89

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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.