Home / 3,109.91-4,291.54-1,782.68

Finding the Fourth Proportional to 3,109.91, 4,291.54 and 1,782.68

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Solution

The fourth proportional to 3,109.91, 4,291.54 and 1,782.68 is: 2,460.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.91 : 4,291.54 = 1,782.68 : x
  2. Step 2: Convert to fraction form
    3,109.91/4,291.54 = 1,782.68/x
  3. Step 3: Cross multiply
    3,109.91x = 4,291.54 × 1,782.68
  4. Step 4: Simplify right side
    3,109.91x = 7,650,448.80
  5. Step 5: Solve for x
    x = 7,650,448.80/3,109.91
  6. Step 6: Final answer
    x = 2,460.03

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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.