Home / 2,116.10-2,920.38-1,219.99

Finding the Fourth Proportional to 2,116.10, 2,920.38 and 1,219.99

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Solution

The fourth proportional to 2,116.10, 2,920.38 and 1,219.99 is: 1,683.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.10 : 2,920.38 = 1,219.99 : x
  2. Step 2: Convert to fraction form
    2,116.10/2,920.38 = 1,219.99/x
  3. Step 3: Cross multiply
    2,116.10x = 2,920.38 × 1,219.99
  4. Step 4: Simplify right side
    2,116.10x = 3,562,819.79
  5. Step 5: Solve for x
    x = 3,562,819.79/2,116.10
  6. Step 6: Final answer
    x = 1,683.67

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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.