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Finding the Fourth Proportional to 3,886.99, 5,830.48 and 1,422.36

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Solution

The fourth proportional to 3,886.99, 5,830.48 and 1,422.36 is: 2,133.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.99 : 5,830.48 = 1,422.36 : x
  2. Step 2: Convert to fraction form
    3,886.99/5,830.48 = 1,422.36/x
  3. Step 3: Cross multiply
    3,886.99x = 5,830.48 × 1,422.36
  4. Step 4: Simplify right side
    3,886.99x = 8,293,043.31
  5. Step 5: Solve for x
    x = 8,293,043.31/3,886.99
  6. Step 6: Final answer
    x = 2,133.54

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Similar ratio
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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.