Home / 3,079.78-4,619.73-999.78

Finding the Fourth Proportional to 3,079.78, 4,619.73 and 999.78

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Solution

The fourth proportional to 3,079.78, 4,619.73 and 999.78 is: 1,499.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,079.78 : 4,619.73 = 999.78 : x
  2. Step 2: Convert to fraction form
    3,079.78/4,619.73 = 999.78/x
  3. Step 3: Cross multiply
    3,079.78x = 4,619.73 × 999.78
  4. Step 4: Simplify right side
    3,079.78x = 4,618,713.66
  5. Step 5: Solve for x
    x = 4,618,713.66/3,079.78
  6. Step 6: Final answer
    x = 1,499.69

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Double scale
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Similar ratio
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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.