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Finding the Fourth Proportional to 250.73, 345.71 and 221.57

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Solution

The fourth proportional to 250.73, 345.71 and 221.57 is: 305.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.73 : 345.71 = 221.57 : x
  2. Step 2: Convert to fraction form
    250.73/345.71 = 221.57/x
  3. Step 3: Cross multiply
    250.73x = 345.71 × 221.57
  4. Step 4: Simplify right side
    250.73x = 76,598.96
  5. Step 5: Solve for x
    x = 76,598.96/250.73
  6. Step 6: Final answer
    x = 305.50

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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.