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Finding the Fourth Proportional to 220.95, 304.91 and 127.70

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Solution

The fourth proportional to 220.95, 304.91 and 127.70 is: 176.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.95 : 304.91 = 127.70 : x
  2. Step 2: Convert to fraction form
    220.95/304.91 = 127.70/x
  3. Step 3: Cross multiply
    220.95x = 304.91 × 127.70
  4. Step 4: Simplify right side
    220.95x = 38,937.10
  5. Step 5: Solve for x
    x = 38,937.10/220.95
  6. Step 6: Final answer
    x = 176.23

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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.