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Finding the Fourth Proportional to 253.91, 350.36 and 155.64

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Solution

The fourth proportional to 253.91, 350.36 and 155.64 is: 214.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.91 : 350.36 = 155.64 : x
  2. Step 2: Convert to fraction form
    253.91/350.36 = 155.64/x
  3. Step 3: Cross multiply
    253.91x = 350.36 × 155.64
  4. Step 4: Simplify right side
    253.91x = 54,529.25
  5. Step 5: Solve for x
    x = 54,529.25/253.91
  6. Step 6: Final answer
    x = 214.76

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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.