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Finding the Fourth Proportional to 235.80, 351.99 and 217.98

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Solution

The fourth proportional to 235.80, 351.99 and 217.98 is: 325.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.80 : 351.99 = 217.98 : x
  2. Step 2: Convert to fraction form
    235.80/351.99 = 217.98/x
  3. Step 3: Cross multiply
    235.80x = 351.99 × 217.98
  4. Step 4: Simplify right side
    235.80x = 76,726.78
  5. Step 5: Solve for x
    x = 76,726.78/235.80
  6. Step 6: Final answer
    x = 325.39

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.