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Finding the Fourth Proportional to 5,321.28, 7,979.04 and 1,858.08

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Solution

The fourth proportional to 5,321.28, 7,979.04 and 1,858.08 is: 2,786.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.28 : 7,979.04 = 1,858.08 : x
  2. Step 2: Convert to fraction form
    5,321.28/7,979.04 = 1,858.08/x
  3. Step 3: Cross multiply
    5,321.28x = 7,979.04 × 1,858.08
  4. Step 4: Simplify right side
    5,321.28x = 14,825,694.64
  5. Step 5: Solve for x
    x = 14,825,694.64/5,321.28
  6. Step 6: Final answer
    x = 2,786.11

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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.