Home / 2,153.21-2,971.42-1,208.96

Finding the Fourth Proportional to 2,153.21, 2,971.42 and 1,208.96

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Solution

The fourth proportional to 2,153.21, 2,971.42 and 1,208.96 is: 1,668.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.21 : 2,971.42 = 1,208.96 : x
  2. Step 2: Convert to fraction form
    2,153.21/2,971.42 = 1,208.96/x
  3. Step 3: Cross multiply
    2,153.21x = 2,971.42 × 1,208.96
  4. Step 4: Simplify right side
    2,153.21x = 3,592,325.72
  5. Step 5: Solve for x
    x = 3,592,325.72/2,153.21
  6. Step 6: Final answer
    x = 1,668.36

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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.