Home / 1,253.21-1,729.91-1,220.09

Finding the Fourth Proportional to 1,253.21, 1,729.91 and 1,220.09

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Solution

The fourth proportional to 1,253.21, 1,729.91 and 1,220.09 is: 1,684.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.21 : 1,729.91 = 1,220.09 : x
  2. Step 2: Convert to fraction form
    1,253.21/1,729.91 = 1,220.09/x
  3. Step 3: Cross multiply
    1,253.21x = 1,729.91 × 1,220.09
  4. Step 4: Simplify right side
    1,253.21x = 2,110,640.29
  5. Step 5: Solve for x
    x = 2,110,640.29/1,253.21
  6. Step 6: Final answer
    x = 1,684.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.