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Finding the Fourth Proportional to 1,863.72, 2,796.49 and 1,319.40

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Solution

The fourth proportional to 1,863.72, 2,796.49 and 1,319.40 is: 1,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.72 : 2,796.49 = 1,319.40 : x
  2. Step 2: Convert to fraction form
    1,863.72/2,796.49 = 1,319.40/x
  3. Step 3: Cross multiply
    1,863.72x = 2,796.49 × 1,319.40
  4. Step 4: Simplify right side
    1,863.72x = 3,689,688.91
  5. Step 5: Solve for x
    x = 3,689,688.91/1,863.72
  6. Step 6: Final answer
    x = 1,979.74

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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.