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Finding the Fourth Proportional to 2,091.42, 3,135.92 and 704.30

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Solution

The fourth proportional to 2,091.42, 3,135.92 and 704.30 is: 1,056.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.42 : 3,135.92 = 704.30 : x
  2. Step 2: Convert to fraction form
    2,091.42/3,135.92 = 704.30/x
  3. Step 3: Cross multiply
    2,091.42x = 3,135.92 × 704.30
  4. Step 4: Simplify right side
    2,091.42x = 2,208,609.25
  5. Step 5: Solve for x
    x = 2,208,609.25/2,091.42
  6. Step 6: Final answer
    x = 1,056.03

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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.