Home / 4,920.80-7,370.40-2,969.60

Finding the Fourth Proportional to 4,920.80, 7,370.40 and 2,969.60

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Solution

The fourth proportional to 4,920.80, 7,370.40 and 2,969.60 is: 4,447.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.80 : 7,370.40 = 2,969.60 : x
  2. Step 2: Convert to fraction form
    4,920.80/7,370.40 = 2,969.60/x
  3. Step 3: Cross multiply
    4,920.80x = 7,370.40 × 2,969.60
  4. Step 4: Simplify right side
    4,920.80x = 21,887,139.84
  5. Step 5: Solve for x
    x = 21,887,139.84/4,920.80
  6. Step 6: Final answer
    x = 4,447.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.