Home / 3,120.55-4,680.82-929.27

Finding the Fourth Proportional to 3,120.55, 4,680.82 and 929.27

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Solution

The fourth proportional to 3,120.55, 4,680.82 and 929.27 is: 1,393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.55 : 4,680.82 = 929.27 : x
  2. Step 2: Convert to fraction form
    3,120.55/4,680.82 = 929.27/x
  3. Step 3: Cross multiply
    3,120.55x = 4,680.82 × 929.27
  4. Step 4: Simplify right side
    3,120.55x = 4,349,745.60
  5. Step 5: Solve for x
    x = 4,349,745.60/3,120.55
  6. Step 6: Final answer
    x = 1,393.90

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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.