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Finding the Fourth Proportional to 406.85, 610.21 and 114.32

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Solution

The fourth proportional to 406.85, 610.21 and 114.32 is: 171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.85 : 610.21 = 114.32 : x
  2. Step 2: Convert to fraction form
    406.85/610.21 = 114.32/x
  3. Step 3: Cross multiply
    406.85x = 610.21 × 114.32
  4. Step 4: Simplify right side
    406.85x = 69,760.45
  5. Step 5: Solve for x
    x = 69,760.45/406.85
  6. Step 6: Final answer
    x = 171.47

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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.