Home / 2,179.70-3,269.55-1,312.19

Finding the Fourth Proportional to 2,179.70, 3,269.55 and 1,312.19

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Solution

The fourth proportional to 2,179.70, 3,269.55 and 1,312.19 is: 1,968.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.70 : 3,269.55 = 1,312.19 : x
  2. Step 2: Convert to fraction form
    2,179.70/3,269.55 = 1,312.19/x
  3. Step 3: Cross multiply
    2,179.70x = 3,269.55 × 1,312.19
  4. Step 4: Simplify right side
    2,179.70x = 4,290,270.81
  5. Step 5: Solve for x
    x = 4,290,270.81/2,179.70
  6. Step 6: Final answer
    x = 1,968.29

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Similar ratio
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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.