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Finding the Fourth Proportional to 2,647.86, 3,961.85 and 1,647.51

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Solution

The fourth proportional to 2,647.86, 3,961.85 and 1,647.51 is: 2,465.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.86 : 3,961.85 = 1,647.51 : x
  2. Step 2: Convert to fraction form
    2,647.86/3,961.85 = 1,647.51/x
  3. Step 3: Cross multiply
    2,647.86x = 3,961.85 × 1,647.51
  4. Step 4: Simplify right side
    2,647.86x = 6,527,179.26
  5. Step 5: Solve for x
    x = 6,527,179.26/2,647.86
  6. Step 6: Final answer
    x = 2,465.08

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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.