Home / 1,972-2,721.72-1,383.44

Finding the Fourth Proportional to 1,972, 2,721.72 and 1,383.44

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Solution

The fourth proportional to 1,972, 2,721.72 and 1,383.44 is: 1,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972 : 2,721.72 = 1,383.44 : x
  2. Step 2: Convert to fraction form
    1,972/2,721.72 = 1,383.44/x
  3. Step 3: Cross multiply
    1,972x = 2,721.72 × 1,383.44
  4. Step 4: Simplify right side
    1,972x = 3,765,336.32
  5. Step 5: Solve for x
    x = 3,765,336.32/1,972
  6. Step 6: Final answer
    x = 1,909.40

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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.