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Finding the Fourth Proportional to 3,863.79, 5,795.68 and 1,398.60

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Solution

The fourth proportional to 3,863.79, 5,795.68 and 1,398.60 is: 2,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,863.79 : 5,795.68 = 1,398.60 : x
  2. Step 2: Convert to fraction form
    3,863.79/5,795.68 = 1,398.60/x
  3. Step 3: Cross multiply
    3,863.79x = 5,795.68 × 1,398.60
  4. Step 4: Simplify right side
    3,863.79x = 8,105,838.05
  5. Step 5: Solve for x
    x = 8,105,838.05/3,863.79
  6. Step 6: Final answer
    x = 2,097.90

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1.5x scale

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.