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Finding the Fourth Proportional to 220.70, 304.34 and 155.08

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Solution

The fourth proportional to 220.70, 304.34 and 155.08 is: 213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.70 : 304.34 = 155.08 : x
  2. Step 2: Convert to fraction form
    220.70/304.34 = 155.08/x
  3. Step 3: Cross multiply
    220.70x = 304.34 × 155.08
  4. Step 4: Simplify right side
    220.70x = 47,197.05
  5. Step 5: Solve for x
    x = 47,197.05/220.70
  6. Step 6: Final answer
    x = 213.85

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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.