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Finding the Fourth Proportional to 3,837.84, 5,756.80 and 1,240.80

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Solution

The fourth proportional to 3,837.84, 5,756.80 and 1,240.80 is: 1,861.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,837.84 : 5,756.80 = 1,240.80 : x
  2. Step 2: Convert to fraction form
    3,837.84/5,756.80 = 1,240.80/x
  3. Step 3: Cross multiply
    3,837.84x = 5,756.80 × 1,240.80
  4. Step 4: Simplify right side
    3,837.84x = 7,143,037.44
  5. Step 5: Solve for x
    x = 7,143,037.44/3,837.84
  6. Step 6: Final answer
    x = 1,861.21

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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.