Home / 1,245.21-1,718.60-949.92

Finding the Fourth Proportional to 1,245.21, 1,718.60 and 949.92

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Solution

The fourth proportional to 1,245.21, 1,718.60 and 949.92 is: 1,311.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.21 : 1,718.60 = 949.92 : x
  2. Step 2: Convert to fraction form
    1,245.21/1,718.60 = 949.92/x
  3. Step 3: Cross multiply
    1,245.21x = 1,718.60 × 949.92
  4. Step 4: Simplify right side
    1,245.21x = 1,632,527.76
  5. Step 5: Solve for x
    x = 1,632,527.76/1,245.21
  6. Step 6: Final answer
    x = 1,311.05

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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.