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Finding the Fourth Proportional to 475.89, 712.80 and 231.90

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Solution

The fourth proportional to 475.89, 712.80 and 231.90 is: 347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.89 : 712.80 = 231.90 : x
  2. Step 2: Convert to fraction form
    475.89/712.80 = 231.90/x
  3. Step 3: Cross multiply
    475.89x = 712.80 × 231.90
  4. Step 4: Simplify right side
    475.89x = 165,298.32
  5. Step 5: Solve for x
    x = 165,298.32/475.89
  6. Step 6: Final answer
    x = 347.35

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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.