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Finding the Fourth Proportional to 1,944.91, 2,916.30 and 1,215

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Solution

The fourth proportional to 1,944.91, 2,916.30 and 1,215 is: 1,821.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,944.91 : 2,916.30 = 1,215 : x
  2. Step 2: Convert to fraction form
    1,944.91/2,916.30 = 1,215/x
  3. Step 3: Cross multiply
    1,944.91x = 2,916.30 × 1,215
  4. Step 4: Simplify right side
    1,944.91x = 3,543,309.06
  5. Step 5: Solve for x
    x = 3,543,309.06/1,944.91
  6. Step 6: Final answer
    x = 1,821.84

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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.