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Finding the Fourth Proportional to 217.38, 300.11 and 151.77

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Solution

The fourth proportional to 217.38, 300.11 and 151.77 is: 209.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.38 : 300.11 = 151.77 : x
  2. Step 2: Convert to fraction form
    217.38/300.11 = 151.77/x
  3. Step 3: Cross multiply
    217.38x = 300.11 × 151.77
  4. Step 4: Simplify right side
    217.38x = 45,547.69
  5. Step 5: Solve for x
    x = 45,547.69/217.38
  6. Step 6: Final answer
    x = 209.53

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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.