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Finding the Fourth Proportional to 253.92, 350.30 and 154.38

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Solution

The fourth proportional to 253.92, 350.30 and 154.38 is: 212.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.92 : 350.30 = 154.38 : x
  2. Step 2: Convert to fraction form
    253.92/350.30 = 154.38/x
  3. Step 3: Cross multiply
    253.92x = 350.30 × 154.38
  4. Step 4: Simplify right side
    253.92x = 54,079.31
  5. Step 5: Solve for x
    x = 54,079.31/253.92
  6. Step 6: Final answer
    x = 212.98

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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.