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Finding the Fourth Proportional to 655.56, 904.68 and 379.56

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Solution

The fourth proportional to 655.56, 904.68 and 379.56 is: 523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 904.68 = 379.56 : x
  2. Step 2: Convert to fraction form
    655.56/904.68 = 379.56/x
  3. Step 3: Cross multiply
    655.56x = 904.68 × 379.56
  4. Step 4: Simplify right side
    655.56x = 343,380.34
  5. Step 5: Solve for x
    x = 343,380.34/655.56
  6. Step 6: Final answer
    x = 523.80

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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.