Home / 3,007.05-4,149.71-1,680.75

Finding the Fourth Proportional to 3,007.05, 4,149.71 and 1,680.75

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Solution

The fourth proportional to 3,007.05, 4,149.71 and 1,680.75 is: 2,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,007.05 : 4,149.71 = 1,680.75 : x
  2. Step 2: Convert to fraction form
    3,007.05/4,149.71 = 1,680.75/x
  3. Step 3: Cross multiply
    3,007.05x = 4,149.71 × 1,680.75
  4. Step 4: Simplify right side
    3,007.05x = 6,974,625.08
  5. Step 5: Solve for x
    x = 6,974,625.08/3,007.05
  6. Step 6: Final answer
    x = 2,319.43

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Half scale
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Double scale
Find fourth proportional to 3,008.05, 4,151.09 and 1,681.75
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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.