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Finding the Fourth Proportional to 312.80, 468.65 and 203.22

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Solution

The fourth proportional to 312.80, 468.65 and 203.22 is: 304.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.80 : 468.65 = 203.22 : x
  2. Step 2: Convert to fraction form
    312.80/468.65 = 203.22/x
  3. Step 3: Cross multiply
    312.80x = 468.65 × 203.22
  4. Step 4: Simplify right side
    312.80x = 95,239.56
  5. Step 5: Solve for x
    x = 95,239.56/312.80
  6. Step 6: Final answer
    x = 304.48

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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.