Home / 3,007.09-4,149.78-1,680.80

Finding the Fourth Proportional to 3,007.09, 4,149.78 and 1,680.80

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Solution

The fourth proportional to 3,007.09, 4,149.78 and 1,680.80 is: 2,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,007.09 : 4,149.78 = 1,680.80 : x
  2. Step 2: Convert to fraction form
    3,007.09/4,149.78 = 1,680.80/x
  3. Step 3: Cross multiply
    3,007.09x = 4,149.78 × 1,680.80
  4. Step 4: Simplify right side
    3,007.09x = 6,974,946.51
  5. Step 5: Solve for x
    x = 6,974,946.51/3,007.09
  6. Step 6: Final answer
    x = 2,319.50

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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.