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Finding the Fourth Proportional to 253.97, 350.48 and 155.79

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Solution

The fourth proportional to 253.97, 350.48 and 155.79 is: 214.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.97 : 350.48 = 155.79 : x
  2. Step 2: Convert to fraction form
    253.97/350.48 = 155.79/x
  3. Step 3: Cross multiply
    253.97x = 350.48 × 155.79
  4. Step 4: Simplify right side
    253.97x = 54,601.08
  5. Step 5: Solve for x
    x = 54,601.08/253.97
  6. Step 6: Final answer
    x = 214.99

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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.