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Finding the Fourth Proportional to 1,946.80, 2,916.41 and 1,728.64

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Solution

The fourth proportional to 1,946.80, 2,916.41 and 1,728.64 is: 2,589.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.80 : 2,916.41 = 1,728.64 : x
  2. Step 2: Convert to fraction form
    1,946.80/2,916.41 = 1,728.64/x
  3. Step 3: Cross multiply
    1,946.80x = 2,916.41 × 1,728.64
  4. Step 4: Simplify right side
    1,946.80x = 5,041,408.40
  5. Step 5: Solve for x
    x = 5,041,408.40/1,946.80
  6. Step 6: Final answer
    x = 2,589.59

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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.