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Finding the Fourth Proportional to 249.79, 376.07 and 221.06

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Solution

The fourth proportional to 249.79, 376.07 and 221.06 is: 332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.79 : 376.07 = 221.06 : x
  2. Step 2: Convert to fraction form
    249.79/376.07 = 221.06/x
  3. Step 3: Cross multiply
    249.79x = 376.07 × 221.06
  4. Step 4: Simplify right side
    249.79x = 83,134.03
  5. Step 5: Solve for x
    x = 83,134.03/249.79
  6. Step 6: Final answer
    x = 332.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.