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Finding the Fourth Proportional to 284.74, 427.12 and 122.24

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Solution

The fourth proportional to 284.74, 427.12 and 122.24 is: 183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.74 : 427.12 = 122.24 : x
  2. Step 2: Convert to fraction form
    284.74/427.12 = 122.24/x
  3. Step 3: Cross multiply
    284.74x = 427.12 × 122.24
  4. Step 4: Simplify right side
    284.74x = 52,211.91
  5. Step 5: Solve for x
    x = 52,211.91/284.74
  6. Step 6: Final answer
    x = 183.37

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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.