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Finding the Fourth Proportional to 254.12, 350.72 and 155.84

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Solution

The fourth proportional to 254.12, 350.72 and 155.84 is: 215.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.12 : 350.72 = 155.84 : x
  2. Step 2: Convert to fraction form
    254.12/350.72 = 155.84/x
  3. Step 3: Cross multiply
    254.12x = 350.72 × 155.84
  4. Step 4: Simplify right side
    254.12x = 54,653.67
  5. Step 5: Solve for x
    x = 54,653.67/254.12
  6. Step 6: Final answer
    x = 215.07

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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.