Home / 2,989.87-4,126.12-1,645.54

Finding the Fourth Proportional to 2,989.87, 4,126.12 and 1,645.54

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Solution

The fourth proportional to 2,989.87, 4,126.12 and 1,645.54 is: 2,270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.87 : 4,126.12 = 1,645.54 : x
  2. Step 2: Convert to fraction form
    2,989.87/4,126.12 = 1,645.54/x
  3. Step 3: Cross multiply
    2,989.87x = 4,126.12 × 1,645.54
  4. Step 4: Simplify right side
    2,989.87x = 6,789,695.50
  5. Step 5: Solve for x
    x = 6,789,695.50/2,989.87
  6. Step 6: Final answer
    x = 2,270.90

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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.