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Finding the Fourth Proportional to 4,921, 6,790.98 and 3,058

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Solution

The fourth proportional to 4,921, 6,790.98 and 3,058 is: 4,220.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921 : 6,790.98 = 3,058 : x
  2. Step 2: Convert to fraction form
    4,921/6,790.98 = 3,058/x
  3. Step 3: Cross multiply
    4,921x = 6,790.98 × 3,058
  4. Step 4: Simplify right side
    4,921x = 20,766,816.84
  5. Step 5: Solve for x
    x = 20,766,816.84/4,921
  6. Step 6: Final answer
    x = 4,220.04

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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.