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Finding the Fourth Proportional to 439.90, 659.81 and 110.84

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Solution

The fourth proportional to 439.90, 659.81 and 110.84 is: 166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.90 : 659.81 = 110.84 : x
  2. Step 2: Convert to fraction form
    439.90/659.81 = 110.84/x
  3. Step 3: Cross multiply
    439.90x = 659.81 × 110.84
  4. Step 4: Simplify right side
    439.90x = 73,130.32
  5. Step 5: Solve for x
    x = 73,130.32/439.90
  6. Step 6: Final answer
    x = 166.24

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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.