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Finding the Fourth Proportional to 2,858.94, 3,945.30 and 1,679.76

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Solution

The fourth proportional to 2,858.94, 3,945.30 and 1,679.76 is: 2,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.94 : 3,945.30 = 1,679.76 : x
  2. Step 2: Convert to fraction form
    2,858.94/3,945.30 = 1,679.76/x
  3. Step 3: Cross multiply
    2,858.94x = 3,945.30 × 1,679.76
  4. Step 4: Simplify right side
    2,858.94x = 6,627,157.13
  5. Step 5: Solve for x
    x = 6,627,157.13/2,858.94
  6. Step 6: Final answer
    x = 2,318.05

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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.