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Finding the Fourth Proportional to 1,876.56, 2,816.22 and 1,390.92

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Solution

The fourth proportional to 1,876.56, 2,816.22 and 1,390.92 is: 2,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,876.56 : 2,816.22 = 1,390.92 : x
  2. Step 2: Convert to fraction form
    1,876.56/2,816.22 = 1,390.92/x
  3. Step 3: Cross multiply
    1,876.56x = 2,816.22 × 1,390.92
  4. Step 4: Simplify right side
    1,876.56x = 3,917,136.72
  5. Step 5: Solve for x
    x = 3,917,136.72/1,876.56
  6. Step 6: Final answer
    x = 2,087.40

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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.