Home / 3,106.71-4,287.42-1,780.68

Finding the Fourth Proportional to 3,106.71, 4,287.42 and 1,780.68

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Solution

The fourth proportional to 3,106.71, 4,287.42 and 1,780.68 is: 2,457.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.71 : 4,287.42 = 1,780.68 : x
  2. Step 2: Convert to fraction form
    3,106.71/4,287.42 = 1,780.68/x
  3. Step 3: Cross multiply
    3,106.71x = 4,287.42 × 1,780.68
  4. Step 4: Simplify right side
    3,106.71x = 7,634,523.05
  5. Step 5: Solve for x
    x = 7,634,523.05/3,106.71
  6. Step 6: Final answer
    x = 2,457.43

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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.