Home / 3,109.14-4,289.76-1,782.06

Finding the Fourth Proportional to 3,109.14, 4,289.76 and 1,782.06

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Solution

The fourth proportional to 3,109.14, 4,289.76 and 1,782.06 is: 2,458.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.14 : 4,289.76 = 1,782.06 : x
  2. Step 2: Convert to fraction form
    3,109.14/4,289.76 = 1,782.06/x
  3. Step 3: Cross multiply
    3,109.14x = 4,289.76 × 1,782.06
  4. Step 4: Simplify right side
    3,109.14x = 7,644,609.71
  5. Step 5: Solve for x
    x = 7,644,609.71/3,109.14
  6. Step 6: Final answer
    x = 2,458.75

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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.