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Finding the Fourth Proportional to 356.92, 492.33 and 225.70

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Solution

The fourth proportional to 356.92, 492.33 and 225.70 is: 311.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.92 : 492.33 = 225.70 : x
  2. Step 2: Convert to fraction form
    356.92/492.33 = 225.70/x
  3. Step 3: Cross multiply
    356.92x = 492.33 × 225.70
  4. Step 4: Simplify right side
    356.92x = 111,118.88
  5. Step 5: Solve for x
    x = 111,118.88/356.92
  6. Step 6: Final answer
    x = 311.33

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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.