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Finding the Fourth Proportional to 406.10, 560.31 and 231.44

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Solution

The fourth proportional to 406.10, 560.31 and 231.44 is: 319.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.10 : 560.31 = 231.44 : x
  2. Step 2: Convert to fraction form
    406.10/560.31 = 231.44/x
  3. Step 3: Cross multiply
    406.10x = 560.31 × 231.44
  4. Step 4: Simplify right side
    406.10x = 129,678.15
  5. Step 5: Solve for x
    x = 129,678.15/406.10
  6. Step 6: Final answer
    x = 319.33

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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.