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Finding the Fourth Proportional to 2,878.56, 3,970.80 and 1,945.44

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Solution

The fourth proportional to 2,878.56, 3,970.80 and 1,945.44 is: 2,683.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.56 : 3,970.80 = 1,945.44 : x
  2. Step 2: Convert to fraction form
    2,878.56/3,970.80 = 1,945.44/x
  3. Step 3: Cross multiply
    2,878.56x = 3,970.80 × 1,945.44
  4. Step 4: Simplify right side
    2,878.56x = 7,724,953.15
  5. Step 5: Solve for x
    x = 7,724,953.15/2,878.56
  6. Step 6: Final answer
    x = 2,683.62

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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.