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Finding the Fourth Proportional to 235.44, 324.68 and 156.74

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Solution

The fourth proportional to 235.44, 324.68 and 156.74 is: 216.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.44 : 324.68 = 156.74 : x
  2. Step 2: Convert to fraction form
    235.44/324.68 = 156.74/x
  3. Step 3: Cross multiply
    235.44x = 324.68 × 156.74
  4. Step 4: Simplify right side
    235.44x = 50,887.94
  5. Step 5: Solve for x
    x = 50,887.94/235.44
  6. Step 6: Final answer
    x = 216.14

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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.