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Finding the Fourth Proportional to 2,913.59, 4,372.21 and 1,940.37

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Solution

The fourth proportional to 2,913.59, 4,372.21 and 1,940.37 is: 2,911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.59 : 4,372.21 = 1,940.37 : x
  2. Step 2: Convert to fraction form
    2,913.59/4,372.21 = 1,940.37/x
  3. Step 3: Cross multiply
    2,913.59x = 4,372.21 × 1,940.37
  4. Step 4: Simplify right side
    2,913.59x = 8,483,705.12
  5. Step 5: Solve for x
    x = 8,483,705.12/2,913.59
  6. Step 6: Final answer
    x = 2,911.77

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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.