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Finding the Fourth Proportional to 202.40, 303.80 and 144.69

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Solution

The fourth proportional to 202.40, 303.80 and 144.69 is: 217.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.40 : 303.80 = 144.69 : x
  2. Step 2: Convert to fraction form
    202.40/303.80 = 144.69/x
  3. Step 3: Cross multiply
    202.40x = 303.80 × 144.69
  4. Step 4: Simplify right side
    202.40x = 43,956.82
  5. Step 5: Solve for x
    x = 43,956.82/202.40
  6. Step 6: Final answer
    x = 217.18

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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.