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Finding the Fourth Proportional to 209.42, 289.04 and 150.50

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Solution

The fourth proportional to 209.42, 289.04 and 150.50 is: 207.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.42 : 289.04 = 150.50 : x
  2. Step 2: Convert to fraction form
    209.42/289.04 = 150.50/x
  3. Step 3: Cross multiply
    209.42x = 289.04 × 150.50
  4. Step 4: Simplify right side
    209.42x = 43,498.32
  5. Step 5: Solve for x
    x = 43,498.32/209.42
  6. Step 6: Final answer
    x = 207.71

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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.