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Finding the Fourth Proportional to 3,858.91, 5,780.28 and 3,199.22

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Solution

The fourth proportional to 3,858.91, 5,780.28 and 3,199.22 is: 4,792.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.91 : 5,780.28 = 3,199.22 : x
  2. Step 2: Convert to fraction form
    3,858.91/5,780.28 = 3,199.22/x
  3. Step 3: Cross multiply
    3,858.91x = 5,780.28 × 3,199.22
  4. Step 4: Simplify right side
    3,858.91x = 18,492,342.48
  5. Step 5: Solve for x
    x = 18,492,342.48/3,858.91
  6. Step 6: Final answer
    x = 4,792.12

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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.