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Finding the Fourth Proportional to 655.97, 905.40 and 376.38

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Solution

The fourth proportional to 655.97, 905.40 and 376.38 is: 519.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.97 : 905.40 = 376.38 : x
  2. Step 2: Convert to fraction form
    655.97/905.40 = 376.38/x
  3. Step 3: Cross multiply
    655.97x = 905.40 × 376.38
  4. Step 4: Simplify right side
    655.97x = 340,774.45
  5. Step 5: Solve for x
    x = 340,774.45/655.97
  6. Step 6: Final answer
    x = 519.50

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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.