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Finding the Fourth Proportional to 209.45, 314.26 and 101.25

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Solution

The fourth proportional to 209.45, 314.26 and 101.25 is: 151.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.45 : 314.26 = 101.25 : x
  2. Step 2: Convert to fraction form
    209.45/314.26 = 101.25/x
  3. Step 3: Cross multiply
    209.45x = 314.26 × 101.25
  4. Step 4: Simplify right side
    209.45x = 31,818.57
  5. Step 5: Solve for x
    x = 31,818.57/209.45
  6. Step 6: Final answer
    x = 151.91

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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.