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Finding the Fourth Proportional to 235.02, 324.42 and 172.89

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Solution

The fourth proportional to 235.02, 324.42 and 172.89 is: 238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.02 : 324.42 = 172.89 : x
  2. Step 2: Convert to fraction form
    235.02/324.42 = 172.89/x
  3. Step 3: Cross multiply
    235.02x = 324.42 × 172.89
  4. Step 4: Simplify right side
    235.02x = 56,088.97
  5. Step 5: Solve for x
    x = 56,088.97/235.02
  6. Step 6: Final answer
    x = 238.66

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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.