Home / 2,828.81-4,243.26-979.98

Finding the Fourth Proportional to 2,828.81, 4,243.26 and 979.98

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Solution

The fourth proportional to 2,828.81, 4,243.26 and 979.98 is: 1,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,828.81 : 4,243.26 = 979.98 : x
  2. Step 2: Convert to fraction form
    2,828.81/4,243.26 = 979.98/x
  3. Step 3: Cross multiply
    2,828.81x = 4,243.26 × 979.98
  4. Step 4: Simplify right side
    2,828.81x = 4,158,292.19
  5. Step 5: Solve for x
    x = 4,158,292.19/2,828.81
  6. Step 6: Final answer
    x = 1,469.98

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1.5x scale

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.