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Finding the Fourth Proportional to 285.07, 393.37 and 168.61

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Solution

The fourth proportional to 285.07, 393.37 and 168.61 is: 232.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.07 : 393.37 = 168.61 : x
  2. Step 2: Convert to fraction form
    285.07/393.37 = 168.61/x
  3. Step 3: Cross multiply
    285.07x = 393.37 × 168.61
  4. Step 4: Simplify right side
    285.07x = 66,326.12
  5. Step 5: Solve for x
    x = 66,326.12/285.07
  6. Step 6: Final answer
    x = 232.67

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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.