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Finding the Fourth Proportional to 4,872.90, 6,723.90 and 2,776.98

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Solution

The fourth proportional to 4,872.90, 6,723.90 and 2,776.98 is: 3,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,872.90 : 6,723.90 = 2,776.98 : x
  2. Step 2: Convert to fraction form
    4,872.90/6,723.90 = 2,776.98/x
  3. Step 3: Cross multiply
    4,872.90x = 6,723.90 × 2,776.98
  4. Step 4: Simplify right side
    4,872.90x = 18,672,135.82
  5. Step 5: Solve for x
    x = 18,672,135.82/4,872.90
  6. Step 6: Final answer
    x = 3,831.83

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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.