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Finding the Fourth Proportional to 215.43, 321.45 and 202.37

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Solution

The fourth proportional to 215.43, 321.45 and 202.37 is: 301.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.43 : 321.45 = 202.37 : x
  2. Step 2: Convert to fraction form
    215.43/321.45 = 202.37/x
  3. Step 3: Cross multiply
    215.43x = 321.45 × 202.37
  4. Step 4: Simplify right side
    215.43x = 65,050.23
  5. Step 5: Solve for x
    x = 65,050.23/215.43
  6. Step 6: Final answer
    x = 301.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.