Home / 3,106.40-4,287.08-1,780.43

Finding the Fourth Proportional to 3,106.40, 4,287.08 and 1,780.43

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Solution

The fourth proportional to 3,106.40, 4,287.08 and 1,780.43 is: 2,457.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.40 : 4,287.08 = 1,780.43 : x
  2. Step 2: Convert to fraction form
    3,106.40/4,287.08 = 1,780.43/x
  3. Step 3: Cross multiply
    3,106.40x = 4,287.08 × 1,780.43
  4. Step 4: Simplify right side
    3,106.40x = 7,632,836.94
  5. Step 5: Solve for x
    x = 7,632,836.94/3,106.40
  6. Step 6: Final answer
    x = 2,457.13

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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.