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Finding the Fourth Proportional to 209.51, 289.13 and 116.26

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Solution

The fourth proportional to 209.51, 289.13 and 116.26 is: 160.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.51 : 289.13 = 116.26 : x
  2. Step 2: Convert to fraction form
    209.51/289.13 = 116.26/x
  3. Step 3: Cross multiply
    209.51x = 289.13 × 116.26
  4. Step 4: Simplify right side
    209.51x = 33,612.95
  5. Step 5: Solve for x
    x = 33,612.95/209.51
  6. Step 6: Final answer
    x = 160.44

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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.