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Finding the Fourth Proportional to 284.88, 427.30 and 189.28

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Solution

The fourth proportional to 284.88, 427.30 and 189.28 is: 283.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.88 : 427.30 = 189.28 : x
  2. Step 2: Convert to fraction form
    284.88/427.30 = 189.28/x
  3. Step 3: Cross multiply
    284.88x = 427.30 × 189.28
  4. Step 4: Simplify right side
    284.88x = 80,879.34
  5. Step 5: Solve for x
    x = 80,879.34/284.88
  6. Step 6: Final answer
    x = 283.91

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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.