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Finding the Fourth Proportional to 5,090.40, 7,628.40 and 3,763.80

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Solution

The fourth proportional to 5,090.40, 7,628.40 and 3,763.80 is: 5,640.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,090.40 : 7,628.40 = 3,763.80 : x
  2. Step 2: Convert to fraction form
    5,090.40/7,628.40 = 3,763.80/x
  3. Step 3: Cross multiply
    5,090.40x = 7,628.40 × 3,763.80
  4. Step 4: Simplify right side
    5,090.40x = 28,711,771.92
  5. Step 5: Solve for x
    x = 28,711,771.92/5,090.40
  6. Step 6: Final answer
    x = 5,640.38

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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.