Home / 1,921.16-2,880.51-1,180.92

Finding the Fourth Proportional to 1,921.16, 2,880.51 and 1,180.92

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Solution

The fourth proportional to 1,921.16, 2,880.51 and 1,180.92 is: 1,770.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.16 : 2,880.51 = 1,180.92 : x
  2. Step 2: Convert to fraction form
    1,921.16/2,880.51 = 1,180.92/x
  3. Step 3: Cross multiply
    1,921.16x = 2,880.51 × 1,180.92
  4. Step 4: Simplify right side
    1,921.16x = 3,401,651.87
  5. Step 5: Solve for x
    x = 3,401,651.87/1,921.16
  6. Step 6: Final answer
    x = 1,770.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.