Home / 1,939.05-2,908.95-768.83

Finding the Fourth Proportional to 1,939.05, 2,908.95 and 768.83

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Solution

The fourth proportional to 1,939.05, 2,908.95 and 768.83 is: 1,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.05 : 2,908.95 = 768.83 : x
  2. Step 2: Convert to fraction form
    1,939.05/2,908.95 = 768.83/x
  3. Step 3: Cross multiply
    1,939.05x = 2,908.95 × 768.83
  4. Step 4: Simplify right side
    1,939.05x = 2,236,473.48
  5. Step 5: Solve for x
    x = 2,236,473.48/1,939.05
  6. Step 6: Final answer
    x = 1,153.39

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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.