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Finding the Fourth Proportional to 299,616.80, 449,487.60 and 99,999.20

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Solution

The fourth proportional to 299,616.80, 449,487.60 and 99,999.20 is: 150,019.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,616.80 : 449,487.60 = 99,999.20 : x
  2. Step 2: Convert to fraction form
    299,616.80/449,487.60 = 99,999.20/x
  3. Step 3: Cross multiply
    299,616.80x = 449,487.60 × 99,999.20
  4. Step 4: Simplify right side
    299,616.80x = 44,948,400,409.92
  5. Step 5: Solve for x
    x = 44,948,400,409.92/299,616.80
  6. Step 6: Final answer
    x = 150,019.63

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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.