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Finding the Fourth Proportional to 284.88, 427.36 and 254.64

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Solution

The fourth proportional to 284.88, 427.36 and 254.64 is: 382.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.88 : 427.36 = 254.64 : x
  2. Step 2: Convert to fraction form
    284.88/427.36 = 254.64/x
  3. Step 3: Cross multiply
    284.88x = 427.36 × 254.64
  4. Step 4: Simplify right side
    284.88x = 108,822.95
  5. Step 5: Solve for x
    x = 108,822.95/284.88
  6. Step 6: Final answer
    x = 382.00

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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.