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Finding the Fourth Proportional to 356.92, 492.60 and 217.06

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Solution

The fourth proportional to 356.92, 492.60 and 217.06 is: 299.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.92 : 492.60 = 217.06 : x
  2. Step 2: Convert to fraction form
    356.92/492.60 = 217.06/x
  3. Step 3: Cross multiply
    356.92x = 492.60 × 217.06
  4. Step 4: Simplify right side
    356.92x = 106,923.76
  5. Step 5: Solve for x
    x = 106,923.76/356.92
  6. Step 6: Final answer
    x = 299.57

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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.