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Finding the Fourth Proportional to 278.63, 384.45 and 190.18

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Solution

The fourth proportional to 278.63, 384.45 and 190.18 is: 262.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.63 : 384.45 = 190.18 : x
  2. Step 2: Convert to fraction form
    278.63/384.45 = 190.18/x
  3. Step 3: Cross multiply
    278.63x = 384.45 × 190.18
  4. Step 4: Simplify right side
    278.63x = 73,112.78
  5. Step 5: Solve for x
    x = 73,112.78/278.63
  6. Step 6: Final answer
    x = 262.41

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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.