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Finding the Fourth Proportional to 342.32, 471.90 and 225.68

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Solution

The fourth proportional to 342.32, 471.90 and 225.68 is: 311.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.32 : 471.90 = 225.68 : x
  2. Step 2: Convert to fraction form
    342.32/471.90 = 225.68/x
  3. Step 3: Cross multiply
    342.32x = 471.90 × 225.68
  4. Step 4: Simplify right side
    342.32x = 106,498.39
  5. Step 5: Solve for x
    x = 106,498.39/342.32
  6. Step 6: Final answer
    x = 311.11

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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.