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Finding the Fourth Proportional to 3,858.79, 5,786.99 and 1,393.29

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Solution

The fourth proportional to 3,858.79, 5,786.99 and 1,393.29 is: 2,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.79 : 5,786.99 = 1,393.29 : x
  2. Step 2: Convert to fraction form
    3,858.79/5,786.99 = 1,393.29/x
  3. Step 3: Cross multiply
    3,858.79x = 5,786.99 × 1,393.29
  4. Step 4: Simplify right side
    3,858.79x = 8,062,955.30
  5. Step 5: Solve for x
    x = 8,062,955.30/3,858.79
  6. Step 6: Final answer
    x = 2,089.50

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Double scale
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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.