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Finding the Fourth Proportional to 235.56, 351.15 and 218.28

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Solution

The fourth proportional to 235.56, 351.15 and 218.28 is: 325.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.56 : 351.15 = 218.28 : x
  2. Step 2: Convert to fraction form
    235.56/351.15 = 218.28/x
  3. Step 3: Cross multiply
    235.56x = 351.15 × 218.28
  4. Step 4: Simplify right side
    235.56x = 76,649.02
  5. Step 5: Solve for x
    x = 76,649.02/235.56
  6. Step 6: Final answer
    x = 325.39

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Why These Related Problems?

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