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Finding the Fourth Proportional to 607,998.80, 911,998.20 and 408,933.20

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Solution

The fourth proportional to 607,998.80, 911,998.20 and 408,933.20 is: 613,399.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,998.80 : 911,998.20 = 408,933.20 : x
  2. Step 2: Convert to fraction form
    607,998.80/911,998.20 = 408,933.20/x
  3. Step 3: Cross multiply
    607,998.80x = 911,998.20 × 408,933.20
  4. Step 4: Simplify right side
    607,998.80x = 372,946,342,320.24
  5. Step 5: Solve for x
    x = 372,946,342,320.24/607,998.80
  6. Step 6: Final answer
    x = 613,399.80

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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.