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Finding the Fourth Proportional to 5,078.97, 7,618.95 and 1,791.90

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Solution

The fourth proportional to 5,078.97, 7,618.95 and 1,791.90 is: 2,688.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.97 : 7,618.95 = 1,791.90 : x
  2. Step 2: Convert to fraction form
    5,078.97/7,618.95 = 1,791.90/x
  3. Step 3: Cross multiply
    5,078.97x = 7,618.95 × 1,791.90
  4. Step 4: Simplify right side
    5,078.97x = 13,652,396.51
  5. Step 5: Solve for x
    x = 13,652,396.51/5,078.97
  6. Step 6: Final answer
    x = 2,688.02

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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.