Home / 1,511.12-2,083.56-1,289.36

Finding the Fourth Proportional to 1,511.12, 2,083.56 and 1,289.36

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Solution

The fourth proportional to 1,511.12, 2,083.56 and 1,289.36 is: 1,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.12 : 2,083.56 = 1,289.36 : x
  2. Step 2: Convert to fraction form
    1,511.12/2,083.56 = 1,289.36/x
  3. Step 3: Cross multiply
    1,511.12x = 2,083.56 × 1,289.36
  4. Step 4: Simplify right side
    1,511.12x = 2,686,458.92
  5. Step 5: Solve for x
    x = 2,686,458.92/1,511.12
  6. Step 6: Final answer
    x = 1,777.79

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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.