Home / 3,112.75-4,295.60-1,870.75

Finding the Fourth Proportional to 3,112.75, 4,295.60 and 1,870.75

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Solution

The fourth proportional to 3,112.75, 4,295.60 and 1,870.75 is: 2,581.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.75 : 4,295.60 = 1,870.75 : x
  2. Step 2: Convert to fraction form
    3,112.75/4,295.60 = 1,870.75/x
  3. Step 3: Cross multiply
    3,112.75x = 4,295.60 × 1,870.75
  4. Step 4: Simplify right side
    3,112.75x = 8,035,984.35
  5. Step 5: Solve for x
    x = 8,035,984.35/3,112.75
  6. Step 6: Final answer
    x = 2,581.64

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.