Home / 1,321.51-1,982.57-704.89

Finding the Fourth Proportional to 1,321.51, 1,982.57 and 704.89

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Solution

The fourth proportional to 1,321.51, 1,982.57 and 704.89 is: 1,057.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.51 : 1,982.57 = 704.89 : x
  2. Step 2: Convert to fraction form
    1,321.51/1,982.57 = 704.89/x
  3. Step 3: Cross multiply
    1,321.51x = 1,982.57 × 704.89
  4. Step 4: Simplify right side
    1,321.51x = 1,397,485.29
  5. Step 5: Solve for x
    x = 1,397,485.29/1,321.51
  6. Step 6: Final answer
    x = 1,057.49

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1.5x scale

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.