Home / 1,511.05-2,267.80-780.83

Finding the Fourth Proportional to 1,511.05, 2,267.80 and 780.83

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Solution

The fourth proportional to 1,511.05, 2,267.80 and 780.83 is: 1,171.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.05 : 2,267.80 = 780.83 : x
  2. Step 2: Convert to fraction form
    1,511.05/2,267.80 = 780.83/x
  3. Step 3: Cross multiply
    1,511.05x = 2,267.80 × 780.83
  4. Step 4: Simplify right side
    1,511.05x = 1,770,766.27
  5. Step 5: Solve for x
    x = 1,770,766.27/1,511.05
  6. Step 6: Final answer
    x = 1,171.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.