Home / 3,218.70-4,828.05-2,109.90

Finding the Fourth Proportional to 3,218.70, 4,828.05 and 2,109.90

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Solution

The fourth proportional to 3,218.70, 4,828.05 and 2,109.90 is: 3,164.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.70 : 4,828.05 = 2,109.90 : x
  2. Step 2: Convert to fraction form
    3,218.70/4,828.05 = 2,109.90/x
  3. Step 3: Cross multiply
    3,218.70x = 4,828.05 × 2,109.90
  4. Step 4: Simplify right side
    3,218.70x = 10,186,702.70
  5. Step 5: Solve for x
    x = 10,186,702.70/3,218.70
  6. Step 6: Final answer
    x = 3,164.85

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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.