Home / 2,890.30-3,987.54-1,896.13

Finding the Fourth Proportional to 2,890.30, 3,987.54 and 1,896.13

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Solution

The fourth proportional to 2,890.30, 3,987.54 and 1,896.13 is: 2,615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.30 : 3,987.54 = 1,896.13 : x
  2. Step 2: Convert to fraction form
    2,890.30/3,987.54 = 1,896.13/x
  3. Step 3: Cross multiply
    2,890.30x = 3,987.54 × 1,896.13
  4. Step 4: Simplify right side
    2,890.30x = 7,560,894.22
  5. Step 5: Solve for x
    x = 7,560,894.22/2,890.30
  6. Step 6: Final answer
    x = 2,615.95

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1.5x scale

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.