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Finding the Fourth Proportional to 284.95, 427.30 and 92.47

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Solution

The fourth proportional to 284.95, 427.30 and 92.47 is: 138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.95 : 427.30 = 92.47 : x
  2. Step 2: Convert to fraction form
    284.95/427.30 = 92.47/x
  3. Step 3: Cross multiply
    284.95x = 427.30 × 92.47
  4. Step 4: Simplify right side
    284.95x = 39,512.43
  5. Step 5: Solve for x
    x = 39,512.43/284.95
  6. Step 6: Final answer
    x = 138.66

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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.