Home / 1,989.75-2,982.91-1,051.57

Finding the Fourth Proportional to 1,989.75, 2,982.91 and 1,051.57

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Solution

The fourth proportional to 1,989.75, 2,982.91 and 1,051.57 is: 1,576.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.75 : 2,982.91 = 1,051.57 : x
  2. Step 2: Convert to fraction form
    1,989.75/2,982.91 = 1,051.57/x
  3. Step 3: Cross multiply
    1,989.75x = 2,982.91 × 1,051.57
  4. Step 4: Simplify right side
    1,989.75x = 3,136,738.67
  5. Step 5: Solve for x
    x = 3,136,738.67/1,989.75
  6. Step 6: Final answer
    x = 1,576.45

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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.