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Finding the Fourth Proportional to 203.56, 305.54 and 155.76

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Solution

The fourth proportional to 203.56, 305.54 and 155.76 is: 233.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.56 : 305.54 = 155.76 : x
  2. Step 2: Convert to fraction form
    203.56/305.54 = 155.76/x
  3. Step 3: Cross multiply
    203.56x = 305.54 × 155.76
  4. Step 4: Simplify right side
    203.56x = 47,590.91
  5. Step 5: Solve for x
    x = 47,590.91/203.56
  6. Step 6: Final answer
    x = 233.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.