Home / 1,921.69-2,651.93-1,082.40

Finding the Fourth Proportional to 1,921.69, 2,651.93 and 1,082.40

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Solution

The fourth proportional to 1,921.69, 2,651.93 and 1,082.40 is: 1,493.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.69 : 2,651.93 = 1,082.40 : x
  2. Step 2: Convert to fraction form
    1,921.69/2,651.93 = 1,082.40/x
  3. Step 3: Cross multiply
    1,921.69x = 2,651.93 × 1,082.40
  4. Step 4: Simplify right side
    1,921.69x = 2,870,445.19
  5. Step 5: Solve for x
    x = 2,870,445.19/1,921.69
  6. Step 6: Final answer
    x = 1,493.71

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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.