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Finding the Fourth Proportional to 278.74, 384.52 and 226.18

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Solution

The fourth proportional to 278.74, 384.52 and 226.18 is: 312.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.74 : 384.52 = 226.18 : x
  2. Step 2: Convert to fraction form
    278.74/384.52 = 226.18/x
  3. Step 3: Cross multiply
    278.74x = 384.52 × 226.18
  4. Step 4: Simplify right side
    278.74x = 86,970.73
  5. Step 5: Solve for x
    x = 86,970.73/278.74
  6. Step 6: Final answer
    x = 312.01

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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.