Home / 3,107.35-4,287.68-1,780.84

Finding the Fourth Proportional to 3,107.35, 4,287.68 and 1,780.84

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Solution

The fourth proportional to 3,107.35, 4,287.68 and 1,780.84 is: 2,457.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.35 : 4,287.68 = 1,780.84 : x
  2. Step 2: Convert to fraction form
    3,107.35/4,287.68 = 1,780.84/x
  3. Step 3: Cross multiply
    3,107.35x = 4,287.68 × 1,780.84
  4. Step 4: Simplify right side
    3,107.35x = 7,635,650.61
  5. Step 5: Solve for x
    x = 7,635,650.61/3,107.35
  6. Step 6: Final answer
    x = 2,457.29

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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.