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Finding the Fourth Proportional to 284.72, 427.38 and 111.38

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Solution

The fourth proportional to 284.72, 427.38 and 111.38 is: 167.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.72 : 427.38 = 111.38 : x
  2. Step 2: Convert to fraction form
    284.72/427.38 = 111.38/x
  3. Step 3: Cross multiply
    284.72x = 427.38 × 111.38
  4. Step 4: Simplify right side
    284.72x = 47,599.03
  5. Step 5: Solve for x
    x = 47,599.03/284.72
  6. Step 6: Final answer
    x = 167.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.