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Finding the Fourth Proportional to 400.36, 600.31 and 156.61

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Solution

The fourth proportional to 400.36, 600.31 and 156.61 is: 234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.36 : 600.31 = 156.61 : x
  2. Step 2: Convert to fraction form
    400.36/600.31 = 156.61/x
  3. Step 3: Cross multiply
    400.36x = 600.31 × 156.61
  4. Step 4: Simplify right side
    400.36x = 94,014.55
  5. Step 5: Solve for x
    x = 94,014.55/400.36
  6. Step 6: Final answer
    x = 234.83

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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.