Home / 1,508.63-2,080.82-919.19

Finding the Fourth Proportional to 1,508.63, 2,080.82 and 919.19

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Solution

The fourth proportional to 1,508.63, 2,080.82 and 919.19 is: 1,267.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.63 : 2,080.82 = 919.19 : x
  2. Step 2: Convert to fraction form
    1,508.63/2,080.82 = 919.19/x
  3. Step 3: Cross multiply
    1,508.63x = 2,080.82 × 919.19
  4. Step 4: Simplify right side
    1,508.63x = 1,912,676.44
  5. Step 5: Solve for x
    x = 1,912,676.44/1,508.63
  6. Step 6: Final answer
    x = 1,267.83

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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.