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Finding the Fourth Proportional to 3,376.51, 5,065.02 and 911.31

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Solution

The fourth proportional to 3,376.51, 5,065.02 and 911.31 is: 1,367.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,376.51 : 5,065.02 = 911.31 : x
  2. Step 2: Convert to fraction form
    3,376.51/5,065.02 = 911.31/x
  3. Step 3: Cross multiply
    3,376.51x = 5,065.02 × 911.31
  4. Step 4: Simplify right side
    3,376.51x = 4,615,784.38
  5. Step 5: Solve for x
    x = 4,615,784.38/3,376.51
  6. Step 6: Final answer
    x = 1,367.03

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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.