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Finding the Fourth Proportional to 2,705.40, 4,163.40 and 2,705.40

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Solution

The fourth proportional to 2,705.40, 4,163.40 and 2,705.40 is: 4,163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,705.40 : 4,163.40 = 2,705.40 : x
  2. Step 2: Convert to fraction form
    2,705.40/4,163.40 = 2,705.40/x
  3. Step 3: Cross multiply
    2,705.40x = 4,163.40 × 2,705.40
  4. Step 4: Simplify right side
    2,705.40x = 11,263,662.36
  5. Step 5: Solve for x
    x = 11,263,662.36/2,705.40
  6. Step 6: Final answer
    x = 4,163.40

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.