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Finding the Fourth Proportional to 2,364.72, 3,546.46 and 721.09

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Solution

The fourth proportional to 2,364.72, 3,546.46 and 721.09 is: 1,081.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,364.72 : 3,546.46 = 721.09 : x
  2. Step 2: Convert to fraction form
    2,364.72/3,546.46 = 721.09/x
  3. Step 3: Cross multiply
    2,364.72x = 3,546.46 × 721.09
  4. Step 4: Simplify right side
    2,364.72x = 2,557,316.84
  5. Step 5: Solve for x
    x = 2,557,316.84/2,364.72
  6. Step 6: Final answer
    x = 1,081.45

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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.