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Finding the Fourth Proportional to 3,575.44, 5,362.98 and 978.39

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Solution

The fourth proportional to 3,575.44, 5,362.98 and 978.39 is: 1,467.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,575.44 : 5,362.98 = 978.39 : x
  2. Step 2: Convert to fraction form
    3,575.44/5,362.98 = 978.39/x
  3. Step 3: Cross multiply
    3,575.44x = 5,362.98 × 978.39
  4. Step 4: Simplify right side
    3,575.44x = 5,247,086.00
  5. Step 5: Solve for x
    x = 5,247,086.00/3,575.44
  6. Step 6: Final answer
    x = 1,467.54

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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.