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Finding the Fourth Proportional to 655.56, 905.05 and 434.81

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Solution

The fourth proportional to 655.56, 905.05 and 434.81 is: 600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 905.05 = 434.81 : x
  2. Step 2: Convert to fraction form
    655.56/905.05 = 434.81/x
  3. Step 3: Cross multiply
    655.56x = 905.05 × 434.81
  4. Step 4: Simplify right side
    655.56x = 393,524.79
  5. Step 5: Solve for x
    x = 393,524.79/655.56
  6. Step 6: Final answer
    x = 600.29

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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.