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Finding the Fourth Proportional to 4,970, 6,858.60 and 2,874.26

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Solution

The fourth proportional to 4,970, 6,858.60 and 2,874.26 is: 3,966.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,970 : 6,858.60 = 2,874.26 : x
  2. Step 2: Convert to fraction form
    4,970/6,858.60 = 2,874.26/x
  3. Step 3: Cross multiply
    4,970x = 6,858.60 × 2,874.26
  4. Step 4: Simplify right side
    4,970x = 19,713,399.64
  5. Step 5: Solve for x
    x = 19,713,399.64/4,970
  6. Step 6: Final answer
    x = 3,966.48

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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.