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Finding the Fourth Proportional to 655.91, 905.11 and 376.15

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Solution

The fourth proportional to 655.91, 905.11 and 376.15 is: 519.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.91 : 905.11 = 376.15 : x
  2. Step 2: Convert to fraction form
    655.91/905.11 = 376.15/x
  3. Step 3: Cross multiply
    655.91x = 905.11 × 376.15
  4. Step 4: Simplify right side
    655.91x = 340,457.13
  5. Step 5: Solve for x
    x = 340,457.13/655.91
  6. Step 6: Final answer
    x = 519.06

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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.