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Finding the Fourth Proportional to 2,840.91, 4,258.19 and 2,145.32

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Solution

The fourth proportional to 2,840.91, 4,258.19 and 2,145.32 is: 3,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.91 : 4,258.19 = 2,145.32 : x
  2. Step 2: Convert to fraction form
    2,840.91/4,258.19 = 2,145.32/x
  3. Step 3: Cross multiply
    2,840.91x = 4,258.19 × 2,145.32
  4. Step 4: Simplify right side
    2,840.91x = 9,135,180.17
  5. Step 5: Solve for x
    x = 9,135,180.17/2,840.91
  6. Step 6: Final answer
    x = 3,215.58

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.