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Finding the Fourth Proportional to 220.24, 303.91 and 126.98

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Solution

The fourth proportional to 220.24, 303.91 and 126.98 is: 175.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.24 : 303.91 = 126.98 : x
  2. Step 2: Convert to fraction form
    220.24/303.91 = 126.98/x
  3. Step 3: Cross multiply
    220.24x = 303.91 × 126.98
  4. Step 4: Simplify right side
    220.24x = 38,588.34
  5. Step 5: Solve for x
    x = 38,588.34/220.24
  6. Step 6: Final answer
    x = 175.21

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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.