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Finding the Fourth Proportional to 219.25, 302.49 and 131.77

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Solution

The fourth proportional to 219.25, 302.49 and 131.77 is: 181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.25 : 302.49 = 131.77 : x
  2. Step 2: Convert to fraction form
    219.25/302.49 = 131.77/x
  3. Step 3: Cross multiply
    219.25x = 302.49 × 131.77
  4. Step 4: Simplify right side
    219.25x = 39,859.11
  5. Step 5: Solve for x
    x = 39,859.11/219.25
  6. Step 6: Final answer
    x = 181.80

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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.