Home / 2,820.01-3,890.05-1,640.95

Finding the Fourth Proportional to 2,820.01, 3,890.05 and 1,640.95

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Solution

The fourth proportional to 2,820.01, 3,890.05 and 1,640.95 is: 2,263.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.01 : 3,890.05 = 1,640.95 : x
  2. Step 2: Convert to fraction form
    2,820.01/3,890.05 = 1,640.95/x
  3. Step 3: Cross multiply
    2,820.01x = 3,890.05 × 1,640.95
  4. Step 4: Simplify right side
    2,820.01x = 6,383,377.55
  5. Step 5: Solve for x
    x = 6,383,377.55/2,820.01
  6. Step 6: Final answer
    x = 2,263.60

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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.