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Finding the Fourth Proportional to 406.51, 609.72 and 113.98

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Solution

The fourth proportional to 406.51, 609.72 and 113.98 is: 170.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.51 : 609.72 = 113.98 : x
  2. Step 2: Convert to fraction form
    406.51/609.72 = 113.98/x
  3. Step 3: Cross multiply
    406.51x = 609.72 × 113.98
  4. Step 4: Simplify right side
    406.51x = 69,496.86
  5. Step 5: Solve for x
    x = 69,496.86/406.51
  6. Step 6: Final answer
    x = 170.96

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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.