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Finding the Fourth Proportional to 225.28, 309.28 and 203.32

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Solution

The fourth proportional to 225.28, 309.28 and 203.32 is: 279.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.28 : 309.28 = 203.32 : x
  2. Step 2: Convert to fraction form
    225.28/309.28 = 203.32/x
  3. Step 3: Cross multiply
    225.28x = 309.28 × 203.32
  4. Step 4: Simplify right side
    225.28x = 62,882.81
  5. Step 5: Solve for x
    x = 62,882.81/225.28
  6. Step 6: Final answer
    x = 279.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.