Home / 2,890.01-3,985.20-2,145.44

Finding the Fourth Proportional to 2,890.01, 3,985.20 and 2,145.44

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Solution

The fourth proportional to 2,890.01, 3,985.20 and 2,145.44 is: 2,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.01 : 3,985.20 = 2,145.44 : x
  2. Step 2: Convert to fraction form
    2,890.01/3,985.20 = 2,145.44/x
  3. Step 3: Cross multiply
    2,890.01x = 3,985.20 × 2,145.44
  4. Step 4: Simplify right side
    2,890.01x = 8,550,007.49
  5. Step 5: Solve for x
    x = 8,550,007.49/2,890.01
  6. Step 6: Final answer
    x = 2,958.47

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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.