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Finding the Fourth Proportional to 475.07, 712.90 and 231.61

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Solution

The fourth proportional to 475.07, 712.90 and 231.61 is: 347.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.07 : 712.90 = 231.61 : x
  2. Step 2: Convert to fraction form
    475.07/712.90 = 231.61/x
  3. Step 3: Cross multiply
    475.07x = 712.90 × 231.61
  4. Step 4: Simplify right side
    475.07x = 165,114.61
  5. Step 5: Solve for x
    x = 165,114.61/475.07
  6. Step 6: Final answer
    x = 347.56

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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.