Home / 1,921.66-2,651.75-1,135.56

Finding the Fourth Proportional to 1,921.66, 2,651.75 and 1,135.56

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Solution

The fourth proportional to 1,921.66, 2,651.75 and 1,135.56 is: 1,566.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.66 : 2,651.75 = 1,135.56 : x
  2. Step 2: Convert to fraction form
    1,921.66/2,651.75 = 1,135.56/x
  3. Step 3: Cross multiply
    1,921.66x = 2,651.75 × 1,135.56
  4. Step 4: Simplify right side
    1,921.66x = 3,011,221.23
  5. Step 5: Solve for x
    x = 3,011,221.23/1,921.66
  6. Step 6: Final answer
    x = 1,566.99

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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.