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Finding the Fourth Proportional to 278.49, 384.27 and 160.44

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Solution

The fourth proportional to 278.49, 384.27 and 160.44 is: 221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.49 : 384.27 = 160.44 : x
  2. Step 2: Convert to fraction form
    278.49/384.27 = 160.44/x
  3. Step 3: Cross multiply
    278.49x = 384.27 × 160.44
  4. Step 4: Simplify right side
    278.49x = 61,652.28
  5. Step 5: Solve for x
    x = 61,652.28/278.49
  6. Step 6: Final answer
    x = 221.38

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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.