Home / 2,151.20-2,968.08-1,219.68

Finding the Fourth Proportional to 2,151.20, 2,968.08 and 1,219.68

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Solution

The fourth proportional to 2,151.20, 2,968.08 and 1,219.68 is: 1,682.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.20 : 2,968.08 = 1,219.68 : x
  2. Step 2: Convert to fraction form
    2,151.20/2,968.08 = 1,219.68/x
  3. Step 3: Cross multiply
    2,151.20x = 2,968.08 × 1,219.68
  4. Step 4: Simplify right side
    2,151.20x = 3,620,107.81
  5. Step 5: Solve for x
    x = 3,620,107.81/2,151.20
  6. Step 6: Final answer
    x = 1,682.83

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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.