Home / 645,816.20-968,609.10-408,734.60

Finding the Fourth Proportional to 645,816.20, 968,609.10 and 408,734.60

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Solution

The fourth proportional to 645,816.20, 968,609.10 and 408,734.60 is: 613,028.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,816.20 : 968,609.10 = 408,734.60 : x
  2. Step 2: Convert to fraction form
    645,816.20/968,609.10 = 408,734.60/x
  3. Step 3: Cross multiply
    645,816.20x = 968,609.10 × 408,734.60
  4. Step 4: Simplify right side
    645,816.20x = 395,904,053,044.86
  5. Step 5: Solve for x
    x = 395,904,053,044.86/645,816.20
  6. Step 6: Final answer
    x = 613,028.99

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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.