Home / 1,879.20-2,815.72-1,000.77

Finding the Fourth Proportional to 1,879.20, 2,815.72 and 1,000.77

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Solution

The fourth proportional to 1,879.20, 2,815.72 and 1,000.77 is: 1,499.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.20 : 2,815.72 = 1,000.77 : x
  2. Step 2: Convert to fraction form
    1,879.20/2,815.72 = 1,000.77/x
  3. Step 3: Cross multiply
    1,879.20x = 2,815.72 × 1,000.77
  4. Step 4: Simplify right side
    1,879.20x = 2,817,891.23
  5. Step 5: Solve for x
    x = 2,817,891.23/1,879.20
  6. Step 6: Final answer
    x = 1,499.52

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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.