Home / 3,479.36-5,218.78-1,287.08

Finding the Fourth Proportional to 3,479.36, 5,218.78 and 1,287.08

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Solution

The fourth proportional to 3,479.36, 5,218.78 and 1,287.08 is: 1,930.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.36 : 5,218.78 = 1,287.08 : x
  2. Step 2: Convert to fraction form
    3,479.36/5,218.78 = 1,287.08/x
  3. Step 3: Cross multiply
    3,479.36x = 5,218.78 × 1,287.08
  4. Step 4: Simplify right side
    3,479.36x = 6,716,987.36
  5. Step 5: Solve for x
    x = 6,716,987.36/3,479.36
  6. Step 6: Final answer
    x = 1,930.52

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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.