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Finding the Fourth Proportional to 655.97, 905.31 and 434.97

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Solution

The fourth proportional to 655.97, 905.31 and 434.97 is: 600.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.97 : 905.31 = 434.97 : x
  2. Step 2: Convert to fraction form
    655.97/905.31 = 434.97/x
  3. Step 3: Cross multiply
    655.97x = 905.31 × 434.97
  4. Step 4: Simplify right side
    655.97x = 393,782.69
  5. Step 5: Solve for x
    x = 393,782.69/655.97
  6. Step 6: Final answer
    x = 600.31

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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.