Home / 2,117.70-3,176.55-1,379.60

Finding the Fourth Proportional to 2,117.70, 3,176.55 and 1,379.60

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Solution

The fourth proportional to 2,117.70, 3,176.55 and 1,379.60 is: 2,069.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.70 : 3,176.55 = 1,379.60 : x
  2. Step 2: Convert to fraction form
    2,117.70/3,176.55 = 1,379.60/x
  3. Step 3: Cross multiply
    2,117.70x = 3,176.55 × 1,379.60
  4. Step 4: Simplify right side
    2,117.70x = 4,382,352.50
  5. Step 5: Solve for x
    x = 4,382,352.50/2,117.70
  6. Step 6: Final answer
    x = 2,069.39

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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.