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Finding the Fourth Proportional to 278.52, 384.72 and 254.37

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Solution

The fourth proportional to 278.52, 384.72 and 254.37 is: 351.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.52 : 384.72 = 254.37 : x
  2. Step 2: Convert to fraction form
    278.52/384.72 = 254.37/x
  3. Step 3: Cross multiply
    278.52x = 384.72 × 254.37
  4. Step 4: Simplify right side
    278.52x = 97,861.72
  5. Step 5: Solve for x
    x = 97,861.72/278.52
  6. Step 6: Final answer
    x = 351.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.