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Finding the Fourth Proportional to 3,409.98, 4,705.90 and 1,917.88

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Solution

The fourth proportional to 3,409.98, 4,705.90 and 1,917.88 is: 2,646.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.98 : 4,705.90 = 1,917.88 : x
  2. Step 2: Convert to fraction form
    3,409.98/4,705.90 = 1,917.88/x
  3. Step 3: Cross multiply
    3,409.98x = 4,705.90 × 1,917.88
  4. Step 4: Simplify right side
    3,409.98x = 9,025,351.49
  5. Step 5: Solve for x
    x = 9,025,351.49/3,409.98
  6. Step 6: Final answer
    x = 2,646.75

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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.