Home / 3,121.35-4,680.75-1,559.49

Finding the Fourth Proportional to 3,121.35, 4,680.75 and 1,559.49

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Solution

The fourth proportional to 3,121.35, 4,680.75 and 1,559.49 is: 2,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.35 : 4,680.75 = 1,559.49 : x
  2. Step 2: Convert to fraction form
    3,121.35/4,680.75 = 1,559.49/x
  3. Step 3: Cross multiply
    3,121.35x = 4,680.75 × 1,559.49
  4. Step 4: Simplify right side
    3,121.35x = 7,299,597.45
  5. Step 5: Solve for x
    x = 7,299,597.45/3,121.35
  6. Step 6: Final answer
    x = 2,338.60

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.