Home / 1,808.28-2,491.86-1,283.40

Finding the Fourth Proportional to 1,808.28, 2,491.86 and 1,283.40

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Solution

The fourth proportional to 1,808.28, 2,491.86 and 1,283.40 is: 1,768.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.28 : 2,491.86 = 1,283.40 : x
  2. Step 2: Convert to fraction form
    1,808.28/2,491.86 = 1,283.40/x
  3. Step 3: Cross multiply
    1,808.28x = 2,491.86 × 1,283.40
  4. Step 4: Simplify right side
    1,808.28x = 3,198,053.12
  5. Step 5: Solve for x
    x = 3,198,053.12/1,808.28
  6. Step 6: Final answer
    x = 1,768.56

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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.