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Finding the Fourth Proportional to 245.97, 369.18 and 219.90

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Solution

The fourth proportional to 245.97, 369.18 and 219.90 is: 330.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.97 : 369.18 = 219.90 : x
  2. Step 2: Convert to fraction form
    245.97/369.18 = 219.90/x
  3. Step 3: Cross multiply
    245.97x = 369.18 × 219.90
  4. Step 4: Simplify right side
    245.97x = 81,184.07
  5. Step 5: Solve for x
    x = 81,184.07/245.97
  6. Step 6: Final answer
    x = 330.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.