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Finding the Fourth Proportional to 3,876.95, 5,816.30 and 1,411.79

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Solution

The fourth proportional to 3,876.95, 5,816.30 and 1,411.79 is: 2,118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.95 : 5,816.30 = 1,411.79 : x
  2. Step 2: Convert to fraction form
    3,876.95/5,816.30 = 1,411.79/x
  3. Step 3: Cross multiply
    3,876.95x = 5,816.30 × 1,411.79
  4. Step 4: Simplify right side
    3,876.95x = 8,211,412.25
  5. Step 5: Solve for x
    x = 8,211,412.25/3,876.95
  6. Step 6: Final answer
    x = 2,118.01

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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.