Home / 2,890.25-3,986.30-1,881.80

Finding the Fourth Proportional to 2,890.25, 3,986.30 and 1,881.80

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Solution

The fourth proportional to 2,890.25, 3,986.30 and 1,881.80 is: 2,595.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.25 : 3,986.30 = 1,881.80 : x
  2. Step 2: Convert to fraction form
    2,890.25/3,986.30 = 1,881.80/x
  3. Step 3: Cross multiply
    2,890.25x = 3,986.30 × 1,881.80
  4. Step 4: Simplify right side
    2,890.25x = 7,501,404.11
  5. Step 5: Solve for x
    x = 7,501,404.11/2,890.25
  6. Step 6: Final answer
    x = 2,595.42

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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.