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Finding the Fourth Proportional to 3,179.52, 4,388 and 1,782.08

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Solution

The fourth proportional to 3,179.52, 4,388 and 1,782.08 is: 2,459.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.52 : 4,388 = 1,782.08 : x
  2. Step 2: Convert to fraction form
    3,179.52/4,388 = 1,782.08/x
  3. Step 3: Cross multiply
    3,179.52x = 4,388 × 1,782.08
  4. Step 4: Simplify right side
    3,179.52x = 7,819,767.04
  5. Step 5: Solve for x
    x = 7,819,767.04/3,179.52
  6. Step 6: Final answer
    x = 2,459.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.