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Finding the Fourth Proportional to 400.61, 600.79 and 140.60

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Solution

The fourth proportional to 400.61, 600.79 and 140.60 is: 210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.61 : 600.79 = 140.60 : x
  2. Step 2: Convert to fraction form
    400.61/600.79 = 140.60/x
  3. Step 3: Cross multiply
    400.61x = 600.79 × 140.60
  4. Step 4: Simplify right side
    400.61x = 84,471.07
  5. Step 5: Solve for x
    x = 84,471.07/400.61
  6. Step 6: Final answer
    x = 210.86

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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.