Home / 1,921.67-2,651.80-1,082.35

Finding the Fourth Proportional to 1,921.67, 2,651.80 and 1,082.35

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Solution

The fourth proportional to 1,921.67, 2,651.80 and 1,082.35 is: 1,493.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.67 : 2,651.80 = 1,082.35 : x
  2. Step 2: Convert to fraction form
    1,921.67/2,651.80 = 1,082.35/x
  3. Step 3: Cross multiply
    1,921.67x = 2,651.80 × 1,082.35
  4. Step 4: Simplify right side
    1,921.67x = 2,870,157.06
  5. Step 5: Solve for x
    x = 2,870,157.06/1,921.67
  6. Step 6: Final answer
    x = 1,493.58

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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.