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Finding the Fourth Proportional to 278.66, 384.52 and 160.62

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Solution

The fourth proportional to 278.66, 384.52 and 160.62 is: 221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.66 : 384.52 = 160.62 : x
  2. Step 2: Convert to fraction form
    278.66/384.52 = 160.62/x
  3. Step 3: Cross multiply
    278.66x = 384.52 × 160.62
  4. Step 4: Simplify right side
    278.66x = 61,761.60
  5. Step 5: Solve for x
    x = 61,761.60/278.66
  6. Step 6: Final answer
    x = 221.64

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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.