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Finding the Fourth Proportional to 1,906.79, 2,860.11 and 932.63

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Solution

The fourth proportional to 1,906.79, 2,860.11 and 932.63 is: 1,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.79 : 2,860.11 = 932.63 : x
  2. Step 2: Convert to fraction form
    1,906.79/2,860.11 = 932.63/x
  3. Step 3: Cross multiply
    1,906.79x = 2,860.11 × 932.63
  4. Step 4: Simplify right side
    1,906.79x = 2,667,410.09
  5. Step 5: Solve for x
    x = 2,667,410.09/1,906.79
  6. Step 6: Final answer
    x = 1,398.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.