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Finding the Fourth Proportional to 2,074.38, 3,110.48 and 613.32

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Solution

The fourth proportional to 2,074.38, 3,110.48 and 613.32 is: 919.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.38 : 3,110.48 = 613.32 : x
  2. Step 2: Convert to fraction form
    2,074.38/3,110.48 = 613.32/x
  3. Step 3: Cross multiply
    2,074.38x = 3,110.48 × 613.32
  4. Step 4: Simplify right side
    2,074.38x = 1,907,719.59
  5. Step 5: Solve for x
    x = 1,907,719.59/2,074.38
  6. Step 6: Final answer
    x = 919.66

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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.