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Finding the Fourth Proportional to 2,686.78, 3,707.22 and 1,567.90

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Solution

The fourth proportional to 2,686.78, 3,707.22 and 1,567.90 is: 2,163.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.78 : 3,707.22 = 1,567.90 : x
  2. Step 2: Convert to fraction form
    2,686.78/3,707.22 = 1,567.90/x
  3. Step 3: Cross multiply
    2,686.78x = 3,707.22 × 1,567.90
  4. Step 4: Simplify right side
    2,686.78x = 5,812,550.24
  5. Step 5: Solve for x
    x = 5,812,550.24/2,686.78
  6. Step 6: Final answer
    x = 2,163.39

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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.