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Finding the Fourth Proportional to 436.70, 655.06 and 379.20

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Solution

The fourth proportional to 436.70, 655.06 and 379.20 is: 568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.70 : 655.06 = 379.20 : x
  2. Step 2: Convert to fraction form
    436.70/655.06 = 379.20/x
  3. Step 3: Cross multiply
    436.70x = 655.06 × 379.20
  4. Step 4: Simplify right side
    436.70x = 248,398.75
  5. Step 5: Solve for x
    x = 248,398.75/436.70
  6. Step 6: Final answer
    x = 568.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.