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Finding the Fourth Proportional to 400.92, 601.20 and 208.68

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Solution

The fourth proportional to 400.92, 601.20 and 208.68 is: 312.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.92 : 601.20 = 208.68 : x
  2. Step 2: Convert to fraction form
    400.92/601.20 = 208.68/x
  3. Step 3: Cross multiply
    400.92x = 601.20 × 208.68
  4. Step 4: Simplify right side
    400.92x = 125,458.42
  5. Step 5: Solve for x
    x = 125,458.42/400.92
  6. Step 6: Final answer
    x = 312.93

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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.