Home / 1,479.24-2,040.66-919.80

Finding the Fourth Proportional to 1,479.24, 2,040.66 and 919.80

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Solution

The fourth proportional to 1,479.24, 2,040.66 and 919.80 is: 1,268.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.24 : 2,040.66 = 919.80 : x
  2. Step 2: Convert to fraction form
    1,479.24/2,040.66 = 919.80/x
  3. Step 3: Cross multiply
    1,479.24x = 2,040.66 × 919.80
  4. Step 4: Simplify right side
    1,479.24x = 1,876,999.07
  5. Step 5: Solve for x
    x = 1,876,999.07/1,479.24
  6. Step 6: Final answer
    x = 1,268.89

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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.