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Finding the Fourth Proportional to 203.64, 305.04 and 107.28

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Solution

The fourth proportional to 203.64, 305.04 and 107.28 is: 160.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.64 : 305.04 = 107.28 : x
  2. Step 2: Convert to fraction form
    203.64/305.04 = 107.28/x
  3. Step 3: Cross multiply
    203.64x = 305.04 × 107.28
  4. Step 4: Simplify right side
    203.64x = 32,724.69
  5. Step 5: Solve for x
    x = 32,724.69/203.64
  6. Step 6: Final answer
    x = 160.70

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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.