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Finding the Fourth Proportional to 400.68, 600.82 and 140.64

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Solution

The fourth proportional to 400.68, 600.82 and 140.64 is: 210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.68 : 600.82 = 140.64 : x
  2. Step 2: Convert to fraction form
    400.68/600.82 = 140.64/x
  3. Step 3: Cross multiply
    400.68x = 600.82 × 140.64
  4. Step 4: Simplify right side
    400.68x = 84,499.32
  5. Step 5: Solve for x
    x = 84,499.32/400.68
  6. Step 6: Final answer
    x = 210.89

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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.