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Finding the Fourth Proportional to 3,480.44, 5,220.67 and 847.95

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Solution

The fourth proportional to 3,480.44, 5,220.67 and 847.95 is: 1,271.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.44 : 5,220.67 = 847.95 : x
  2. Step 2: Convert to fraction form
    3,480.44/5,220.67 = 847.95/x
  3. Step 3: Cross multiply
    3,480.44x = 5,220.67 × 847.95
  4. Step 4: Simplify right side
    3,480.44x = 4,426,847.02
  5. Step 5: Solve for x
    x = 4,426,847.02/3,480.44
  6. Step 6: Final answer
    x = 1,271.92

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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.