Home / 1,213.21-1,817.91-1,122.07

Finding the Fourth Proportional to 1,213.21, 1,817.91 and 1,122.07

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Solution

The fourth proportional to 1,213.21, 1,817.91 and 1,122.07 is: 1,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.21 : 1,817.91 = 1,122.07 : x
  2. Step 2: Convert to fraction form
    1,213.21/1,817.91 = 1,122.07/x
  3. Step 3: Cross multiply
    1,213.21x = 1,817.91 × 1,122.07
  4. Step 4: Simplify right side
    1,213.21x = 2,039,822.27
  5. Step 5: Solve for x
    x = 2,039,822.27/1,213.21
  6. Step 6: Final answer
    x = 1,681.34

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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.