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Finding the Fourth Proportional to 202.06, 278.28 and 191.63

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Solution

The fourth proportional to 202.06, 278.28 and 191.63 is: 263.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.06 : 278.28 = 191.63 : x
  2. Step 2: Convert to fraction form
    202.06/278.28 = 191.63/x
  3. Step 3: Cross multiply
    202.06x = 278.28 × 191.63
  4. Step 4: Simplify right side
    202.06x = 53,326.80
  5. Step 5: Solve for x
    x = 53,326.80/202.06
  6. Step 6: Final answer
    x = 263.92

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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.