Home / 3,120.37-4,680.25-928.91

Finding the Fourth Proportional to 3,120.37, 4,680.25 and 928.91

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Solution

The fourth proportional to 3,120.37, 4,680.25 and 928.91 is: 1,393.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.37 : 4,680.25 = 928.91 : x
  2. Step 2: Convert to fraction form
    3,120.37/4,680.25 = 928.91/x
  3. Step 3: Cross multiply
    3,120.37x = 4,680.25 × 928.91
  4. Step 4: Simplify right side
    3,120.37x = 4,347,540.41
  5. Step 5: Solve for x
    x = 4,347,540.41/3,120.37
  6. Step 6: Final answer
    x = 1,393.28

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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.