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Finding the Fourth Proportional to 235.51, 325.13 and 161.22

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Solution

The fourth proportional to 235.51, 325.13 and 161.22 is: 222.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.51 : 325.13 = 161.22 : x
  2. Step 2: Convert to fraction form
    235.51/325.13 = 161.22/x
  3. Step 3: Cross multiply
    235.51x = 325.13 × 161.22
  4. Step 4: Simplify right side
    235.51x = 52,417.46
  5. Step 5: Solve for x
    x = 52,417.46/235.51
  6. Step 6: Final answer
    x = 222.57

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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.