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Finding the Fourth Proportional to 475.08, 655.56 and 309.42

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Solution

The fourth proportional to 475.08, 655.56 and 309.42 is: 426.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.08 : 655.56 = 309.42 : x
  2. Step 2: Convert to fraction form
    475.08/655.56 = 309.42/x
  3. Step 3: Cross multiply
    475.08x = 655.56 × 309.42
  4. Step 4: Simplify right side
    475.08x = 202,843.38
  5. Step 5: Solve for x
    x = 202,843.38/475.08
  6. Step 6: Final answer
    x = 426.97

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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.