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Finding the Fourth Proportional to 2,110, 3,164.65 and 939.72

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Solution

The fourth proportional to 2,110, 3,164.65 and 939.72 is: 1,409.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,110 : 3,164.65 = 939.72 : x
  2. Step 2: Convert to fraction form
    2,110/3,164.65 = 939.72/x
  3. Step 3: Cross multiply
    2,110x = 3,164.65 × 939.72
  4. Step 4: Simplify right side
    2,110x = 2,973,884.90
  5. Step 5: Solve for x
    x = 2,973,884.90/2,110
  6. Step 6: Final answer
    x = 1,409.42

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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.