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Finding the Fourth Proportional to 4,800.90, 6,628.30 and 3,918.80

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Solution

The fourth proportional to 4,800.90, 6,628.30 and 3,918.80 is: 5,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,800.90 : 6,628.30 = 3,918.80 : x
  2. Step 2: Convert to fraction form
    4,800.90/6,628.30 = 3,918.80/x
  3. Step 3: Cross multiply
    4,800.90x = 6,628.30 × 3,918.80
  4. Step 4: Simplify right side
    4,800.90x = 25,974,982.04
  5. Step 5: Solve for x
    x = 25,974,982.04/4,800.90
  6. Step 6: Final answer
    x = 5,410.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.