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Finding the Fourth Proportional to 285.34, 393.68 and 167.32

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Solution

The fourth proportional to 285.34, 393.68 and 167.32 is: 230.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.34 : 393.68 = 167.32 : x
  2. Step 2: Convert to fraction form
    285.34/393.68 = 167.32/x
  3. Step 3: Cross multiply
    285.34x = 393.68 × 167.32
  4. Step 4: Simplify right side
    285.34x = 65,870.54
  5. Step 5: Solve for x
    x = 65,870.54/285.34
  6. Step 6: Final answer
    x = 230.85

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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.