Home / 2,151.22-2,968.32-1,311.64

Finding the Fourth Proportional to 2,151.22, 2,968.32 and 1,311.64

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Solution

The fourth proportional to 2,151.22, 2,968.32 and 1,311.64 is: 1,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.22 : 2,968.32 = 1,311.64 : x
  2. Step 2: Convert to fraction form
    2,151.22/2,968.32 = 1,311.64/x
  3. Step 3: Cross multiply
    2,151.22x = 2,968.32 × 1,311.64
  4. Step 4: Simplify right side
    2,151.22x = 3,893,367.24
  5. Step 5: Solve for x
    x = 3,893,367.24/2,151.22
  6. Step 6: Final answer
    x = 1,809.84

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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.