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Finding the Fourth Proportional to 278.68, 384.75 and 191.62

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Solution

The fourth proportional to 278.68, 384.75 and 191.62 is: 264.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.68 : 384.75 = 191.62 : x
  2. Step 2: Convert to fraction form
    278.68/384.75 = 191.62/x
  3. Step 3: Cross multiply
    278.68x = 384.75 × 191.62
  4. Step 4: Simplify right side
    278.68x = 73,725.80
  5. Step 5: Solve for x
    x = 73,725.80/278.68
  6. Step 6: Final answer
    x = 264.55

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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.