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Finding the Fourth Proportional to 3,890.07, 5,360.62 and 2,767.87

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Solution

The fourth proportional to 3,890.07, 5,360.62 and 2,767.87 is: 3,814.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.07 : 5,360.62 = 2,767.87 : x
  2. Step 2: Convert to fraction form
    3,890.07/5,360.62 = 2,767.87/x
  3. Step 3: Cross multiply
    3,890.07x = 5,360.62 × 2,767.87
  4. Step 4: Simplify right side
    3,890.07x = 14,837,472.48
  5. Step 5: Solve for x
    x = 14,837,472.48/3,890.07
  6. Step 6: Final answer
    x = 3,814.19

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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.