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Finding the Fourth Proportional to 284.78, 427.01 and 130.64

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Solution

The fourth proportional to 284.78, 427.01 and 130.64 is: 195.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.78 : 427.01 = 130.64 : x
  2. Step 2: Convert to fraction form
    284.78/427.01 = 130.64/x
  3. Step 3: Cross multiply
    284.78x = 427.01 × 130.64
  4. Step 4: Simplify right side
    284.78x = 55,781.80
  5. Step 5: Solve for x
    x = 55,781.80/284.78
  6. Step 6: Final answer
    x = 195.88

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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.