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Finding the Fourth Proportional to 3,319.14, 4,978.98 and 3,231.66

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Solution

The fourth proportional to 3,319.14, 4,978.98 and 3,231.66 is: 4,847.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.14 : 4,978.98 = 3,231.66 : x
  2. Step 2: Convert to fraction form
    3,319.14/4,978.98 = 3,231.66/x
  3. Step 3: Cross multiply
    3,319.14x = 4,978.98 × 3,231.66
  4. Step 4: Simplify right side
    3,319.14x = 16,090,370.51
  5. Step 5: Solve for x
    x = 16,090,370.51/3,319.14
  6. Step 6: Final answer
    x = 4,847.75

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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.