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Finding the Fourth Proportional to 203.18, 280.26 and 144.08

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Solution

The fourth proportional to 203.18, 280.26 and 144.08 is: 198.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.18 : 280.26 = 144.08 : x
  2. Step 2: Convert to fraction form
    203.18/280.26 = 144.08/x
  3. Step 3: Cross multiply
    203.18x = 280.26 × 144.08
  4. Step 4: Simplify right side
    203.18x = 40,379.51
  5. Step 5: Solve for x
    x = 40,379.51/203.18
  6. Step 6: Final answer
    x = 198.74

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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.