Home / 4,975.20-6,866.40-2,879.28

Finding the Fourth Proportional to 4,975.20, 6,866.40 and 2,879.28

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Solution

The fourth proportional to 4,975.20, 6,866.40 and 2,879.28 is: 3,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,975.20 : 6,866.40 = 2,879.28 : x
  2. Step 2: Convert to fraction form
    4,975.20/6,866.40 = 2,879.28/x
  3. Step 3: Cross multiply
    4,975.20x = 6,866.40 × 2,879.28
  4. Step 4: Simplify right side
    4,975.20x = 19,770,288.19
  5. Step 5: Solve for x
    x = 19,770,288.19/4,975.20
  6. Step 6: Final answer
    x = 3,973.77

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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.