Home / 1,383.21-2,064.66-1,221.01

Finding the Fourth Proportional to 1,383.21, 2,064.66 and 1,221.01

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Solution

The fourth proportional to 1,383.21, 2,064.66 and 1,221.01 is: 1,822.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.21 : 2,064.66 = 1,221.01 : x
  2. Step 2: Convert to fraction form
    1,383.21/2,064.66 = 1,221.01/x
  3. Step 3: Cross multiply
    1,383.21x = 2,064.66 × 1,221.01
  4. Step 4: Simplify right side
    1,383.21x = 2,520,960.77
  5. Step 5: Solve for x
    x = 2,520,960.77/1,383.21
  6. Step 6: Final answer
    x = 1,822.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.