Home / 1,971.40-2,721.80-1,226.37

Finding the Fourth Proportional to 1,971.40, 2,721.80 and 1,226.37

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Solution

The fourth proportional to 1,971.40, 2,721.80 and 1,226.37 is: 1,693.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.40 : 2,721.80 = 1,226.37 : x
  2. Step 2: Convert to fraction form
    1,971.40/2,721.80 = 1,226.37/x
  3. Step 3: Cross multiply
    1,971.40x = 2,721.80 × 1,226.37
  4. Step 4: Simplify right side
    1,971.40x = 3,337,927.73
  5. Step 5: Solve for x
    x = 3,337,927.73/1,971.40
  6. Step 6: Final answer
    x = 1,693.18

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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.