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Finding the Fourth Proportional to 220.99, 304.91 and 127.74

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Solution

The fourth proportional to 220.99, 304.91 and 127.74 is: 176.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.99 : 304.91 = 127.74 : x
  2. Step 2: Convert to fraction form
    220.99/304.91 = 127.74/x
  3. Step 3: Cross multiply
    220.99x = 304.91 × 127.74
  4. Step 4: Simplify right side
    220.99x = 38,949.20
  5. Step 5: Solve for x
    x = 38,949.20/220.99
  6. Step 6: Final answer
    x = 176.25

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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.