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Finding the Fourth Proportional to 3,384.80, 5,078.08 and 1,999.28

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Solution

The fourth proportional to 3,384.80, 5,078.08 and 1,999.28 is: 2,999.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,384.80 : 5,078.08 = 1,999.28 : x
  2. Step 2: Convert to fraction form
    3,384.80/5,078.08 = 1,999.28/x
  3. Step 3: Cross multiply
    3,384.80x = 5,078.08 × 1,999.28
  4. Step 4: Simplify right side
    3,384.80x = 10,152,503.78
  5. Step 5: Solve for x
    x = 10,152,503.78/3,384.80
  6. Step 6: Final answer
    x = 2,999.44

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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.