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Finding the Fourth Proportional to 2,491.80, 3,740.40 and 1,946.40

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Solution

The fourth proportional to 2,491.80, 3,740.40 and 1,946.40 is: 2,921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.80 : 3,740.40 = 1,946.40 : x
  2. Step 2: Convert to fraction form
    2,491.80/3,740.40 = 1,946.40/x
  3. Step 3: Cross multiply
    2,491.80x = 3,740.40 × 1,946.40
  4. Step 4: Simplify right side
    2,491.80x = 7,280,314.56
  5. Step 5: Solve for x
    x = 7,280,314.56/2,491.80
  6. Step 6: Final answer
    x = 2,921.71

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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.