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Finding the Fourth Proportional to 278.25, 384.20 and 190.77

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Solution

The fourth proportional to 278.25, 384.20 and 190.77 is: 263.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.25 : 384.20 = 190.77 : x
  2. Step 2: Convert to fraction form
    278.25/384.20 = 190.77/x
  3. Step 3: Cross multiply
    278.25x = 384.20 × 190.77
  4. Step 4: Simplify right side
    278.25x = 73,292.88
  5. Step 5: Solve for x
    x = 73,292.88/278.25
  6. Step 6: Final answer
    x = 263.41

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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.