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Finding the Fourth Proportional to 3,607.45, 4,978.29 and 1,992.37

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Solution

The fourth proportional to 3,607.45, 4,978.29 and 1,992.37 is: 2,749.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,607.45 : 4,978.29 = 1,992.37 : x
  2. Step 2: Convert to fraction form
    3,607.45/4,978.29 = 1,992.37/x
  3. Step 3: Cross multiply
    3,607.45x = 4,978.29 × 1,992.37
  4. Step 4: Simplify right side
    3,607.45x = 9,918,595.65
  5. Step 5: Solve for x
    x = 9,918,595.65/3,607.45
  6. Step 6: Final answer
    x = 2,749.48

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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.