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Finding the Fourth Proportional to 203.43, 280.80 and 141.40

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Solution

The fourth proportional to 203.43, 280.80 and 141.40 is: 195.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.43 : 280.80 = 141.40 : x
  2. Step 2: Convert to fraction form
    203.43/280.80 = 141.40/x
  3. Step 3: Cross multiply
    203.43x = 280.80 × 141.40
  4. Step 4: Simplify right side
    203.43x = 39,703.01
  5. Step 5: Solve for x
    x = 39,703.01/203.43
  6. Step 6: Final answer
    x = 195.17

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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.