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Finding the Fourth Proportional to 2,840.88, 3,920.42 and 1,662.18

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Solution

The fourth proportional to 2,840.88, 3,920.42 and 1,662.18 is: 2,293.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.88 : 3,920.42 = 1,662.18 : x
  2. Step 2: Convert to fraction form
    2,840.88/3,920.42 = 1,662.18/x
  3. Step 3: Cross multiply
    2,840.88x = 3,920.42 × 1,662.18
  4. Step 4: Simplify right side
    2,840.88x = 6,516,448.99
  5. Step 5: Solve for x
    x = 6,516,448.99/2,840.88
  6. Step 6: Final answer
    x = 2,293.81

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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.