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Finding the Fourth Proportional to 284.85, 427.95 and 187.43

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Solution

The fourth proportional to 284.85, 427.95 and 187.43 is: 281.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.85 : 427.95 = 187.43 : x
  2. Step 2: Convert to fraction form
    284.85/427.95 = 187.43/x
  3. Step 3: Cross multiply
    284.85x = 427.95 × 187.43
  4. Step 4: Simplify right side
    284.85x = 80,208.53
  5. Step 5: Solve for x
    x = 80,208.53/284.85
  6. Step 6: Final answer
    x = 281.58

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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.