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Finding the Fourth Proportional to 2,798.01, 3,861.90 and 1,679.58

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Solution

The fourth proportional to 2,798.01, 3,861.90 and 1,679.58 is: 2,318.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.01 : 3,861.90 = 1,679.58 : x
  2. Step 2: Convert to fraction form
    2,798.01/3,861.90 = 1,679.58/x
  3. Step 3: Cross multiply
    2,798.01x = 3,861.90 × 1,679.58
  4. Step 4: Simplify right side
    2,798.01x = 6,486,370.00
  5. Step 5: Solve for x
    x = 6,486,370.00/2,798.01
  6. Step 6: Final answer
    x = 2,318.21

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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.