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Finding the Fourth Proportional to 235.61, 324.94 and 156.93

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Solution

The fourth proportional to 235.61, 324.94 and 156.93 is: 216.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.61 : 324.94 = 156.93 : x
  2. Step 2: Convert to fraction form
    235.61/324.94 = 156.93/x
  3. Step 3: Cross multiply
    235.61x = 324.94 × 156.93
  4. Step 4: Simplify right side
    235.61x = 50,991.22
  5. Step 5: Solve for x
    x = 50,991.22/235.61
  6. Step 6: Final answer
    x = 216.42

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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.