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Finding the Fourth Proportional to 253.87, 350.35 and 155.61

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Solution

The fourth proportional to 253.87, 350.35 and 155.61 is: 214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.87 : 350.35 = 155.61 : x
  2. Step 2: Convert to fraction form
    253.87/350.35 = 155.61/x
  3. Step 3: Cross multiply
    253.87x = 350.35 × 155.61
  4. Step 4: Simplify right side
    253.87x = 54,517.96
  5. Step 5: Solve for x
    x = 54,517.96/253.87
  6. Step 6: Final answer
    x = 214.75

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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.