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Finding the Fourth Proportional to 203.90, 305.94 and 95.77

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Solution

The fourth proportional to 203.90, 305.94 and 95.77 is: 143.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.90 : 305.94 = 95.77 : x
  2. Step 2: Convert to fraction form
    203.90/305.94 = 95.77/x
  3. Step 3: Cross multiply
    203.90x = 305.94 × 95.77
  4. Step 4: Simplify right side
    203.90x = 29,299.87
  5. Step 5: Solve for x
    x = 29,299.87/203.90
  6. Step 6: Final answer
    x = 143.70

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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.