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Finding the Fourth Proportional to 2,684.90, 3,705.20 and 1,505.94

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Solution

The fourth proportional to 2,684.90, 3,705.20 and 1,505.94 is: 2,078.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,684.90 : 3,705.20 = 1,505.94 : x
  2. Step 2: Convert to fraction form
    2,684.90/3,705.20 = 1,505.94/x
  3. Step 3: Cross multiply
    2,684.90x = 3,705.20 × 1,505.94
  4. Step 4: Simplify right side
    2,684.90x = 5,579,801.36
  5. Step 5: Solve for x
    x = 5,579,801.36/2,684.90
  6. Step 6: Final answer
    x = 2,078.22

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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.