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Finding the Fourth Proportional to 235.41, 324.71 and 156.61

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Solution

The fourth proportional to 235.41, 324.71 and 156.61 is: 216.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.41 : 324.71 = 156.61 : x
  2. Step 2: Convert to fraction form
    235.41/324.71 = 156.61/x
  3. Step 3: Cross multiply
    235.41x = 324.71 × 156.61
  4. Step 4: Simplify right side
    235.41x = 50,852.83
  5. Step 5: Solve for x
    x = 50,852.83/235.41
  6. Step 6: Final answer
    x = 216.02

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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.