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Finding the Fourth Proportional to 655.79, 905.02 and 376.06

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Solution

The fourth proportional to 655.79, 905.02 and 376.06 is: 518.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.79 : 905.02 = 376.06 : x
  2. Step 2: Convert to fraction form
    655.79/905.02 = 376.06/x
  3. Step 3: Cross multiply
    655.79x = 905.02 × 376.06
  4. Step 4: Simplify right side
    655.79x = 340,338.62
  5. Step 5: Solve for x
    x = 340,338.62/655.79
  6. Step 6: Final answer
    x = 518.97

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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.