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Finding the Fourth Proportional to 5,779.49, 7,976.72 and 3,422.78

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Solution

The fourth proportional to 5,779.49, 7,976.72 and 3,422.78 is: 4,724.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,779.49 : 7,976.72 = 3,422.78 : x
  2. Step 2: Convert to fraction form
    5,779.49/7,976.72 = 3,422.78/x
  3. Step 3: Cross multiply
    5,779.49x = 7,976.72 × 3,422.78
  4. Step 4: Simplify right side
    5,779.49x = 27,302,557.68
  5. Step 5: Solve for x
    x = 27,302,557.68/5,779.49
  6. Step 6: Final answer
    x = 4,724.04

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1.5x scale

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.