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Finding the Fourth Proportional to 278.22, 384.06 and 190.17

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Solution

The fourth proportional to 278.22, 384.06 and 190.17 is: 262.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.22 : 384.06 = 190.17 : x
  2. Step 2: Convert to fraction form
    278.22/384.06 = 190.17/x
  3. Step 3: Cross multiply
    278.22x = 384.06 × 190.17
  4. Step 4: Simplify right side
    278.22x = 73,036.69
  5. Step 5: Solve for x
    x = 73,036.69/278.22
  6. Step 6: Final answer
    x = 262.51

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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.