Home / 3,112.10-4,668.60-920.84

Finding the Fourth Proportional to 3,112.10, 4,668.60 and 920.84

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Solution

The fourth proportional to 3,112.10, 4,668.60 and 920.84 is: 1,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.10 : 4,668.60 = 920.84 : x
  2. Step 2: Convert to fraction form
    3,112.10/4,668.60 = 920.84/x
  3. Step 3: Cross multiply
    3,112.10x = 4,668.60 × 920.84
  4. Step 4: Simplify right side
    3,112.10x = 4,299,033.62
  5. Step 5: Solve for x
    x = 4,299,033.62/3,112.10
  6. Step 6: Final answer
    x = 1,381.39

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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.