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Finding the Fourth Proportional to 599,996.80, 899,995.20 and 388,489.60

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Solution

The fourth proportional to 599,996.80, 899,995.20 and 388,489.60 is: 582,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    599,996.80 : 899,995.20 = 388,489.60 : x
  2. Step 2: Convert to fraction form
    599,996.80/899,995.20 = 388,489.60/x
  3. Step 3: Cross multiply
    599,996.80x = 899,995.20 × 388,489.60
  4. Step 4: Simplify right side
    599,996.80x = 349,638,775,249.92
  5. Step 5: Solve for x
    x = 349,638,775,249.92/599,996.80
  6. Step 6: Final answer
    x = 582,734.40

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Similar ratio
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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.