Home / 2,135.43-2,946.91-1,191.21

Finding the Fourth Proportional to 2,135.43, 2,946.91 and 1,191.21

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Solution

The fourth proportional to 2,135.43, 2,946.91 and 1,191.21 is: 1,643.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.43 : 2,946.91 = 1,191.21 : x
  2. Step 2: Convert to fraction form
    2,135.43/2,946.91 = 1,191.21/x
  3. Step 3: Cross multiply
    2,135.43x = 2,946.91 × 1,191.21
  4. Step 4: Simplify right side
    2,135.43x = 3,510,390.15
  5. Step 5: Solve for x
    x = 3,510,390.15/2,135.43
  6. Step 6: Final answer
    x = 1,643.88

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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.