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Finding the Fourth Proportional to 250.76, 345.94 and 157.43

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Solution

The fourth proportional to 250.76, 345.94 and 157.43 is: 217.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.76 : 345.94 = 157.43 : x
  2. Step 2: Convert to fraction form
    250.76/345.94 = 157.43/x
  3. Step 3: Cross multiply
    250.76x = 345.94 × 157.43
  4. Step 4: Simplify right side
    250.76x = 54,461.81
  5. Step 5: Solve for x
    x = 54,461.81/250.76
  6. Step 6: Final answer
    x = 217.18

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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.