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Finding the Fourth Proportional to 250.21, 345.42 and 157.04

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Solution

The fourth proportional to 250.21, 345.42 and 157.04 is: 216.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.21 : 345.42 = 157.04 : x
  2. Step 2: Convert to fraction form
    250.21/345.42 = 157.04/x
  3. Step 3: Cross multiply
    250.21x = 345.42 × 157.04
  4. Step 4: Simplify right side
    250.21x = 54,243.03
  5. Step 5: Solve for x
    x = 54,243.03/250.21
  6. Step 6: Final answer
    x = 216.79

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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.