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Finding the Fourth Proportional to 3,719.62, 5,580.41 and 1,640.05

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Solution

The fourth proportional to 3,719.62, 5,580.41 and 1,640.05 is: 2,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719.62 : 5,580.41 = 1,640.05 : x
  2. Step 2: Convert to fraction form
    3,719.62/5,580.41 = 1,640.05/x
  3. Step 3: Cross multiply
    3,719.62x = 5,580.41 × 1,640.05
  4. Step 4: Simplify right side
    3,719.62x = 9,152,151.42
  5. Step 5: Solve for x
    x = 9,152,151.42/3,719.62
  6. Step 6: Final answer
    x = 2,460.51

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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.