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Finding the Fourth Proportional to 2,618.52, 3,927.72 and 1,319.64

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Solution

The fourth proportional to 2,618.52, 3,927.72 and 1,319.64 is: 1,979.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.52 : 3,927.72 = 1,319.64 : x
  2. Step 2: Convert to fraction form
    2,618.52/3,927.72 = 1,319.64/x
  3. Step 3: Cross multiply
    2,618.52x = 3,927.72 × 1,319.64
  4. Step 4: Simplify right side
    2,618.52x = 5,183,176.42
  5. Step 5: Solve for x
    x = 5,183,176.42/2,618.52
  6. Step 6: Final answer
    x = 1,979.43

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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.