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Finding the Fourth Proportional to 431,400.70, 647,101.05 and 406,906.30

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Solution

The fourth proportional to 431,400.70, 647,101.05 and 406,906.30 is: 610,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,400.70 : 647,101.05 = 406,906.30 : x
  2. Step 2: Convert to fraction form
    431,400.70/647,101.05 = 406,906.30/x
  3. Step 3: Cross multiply
    431,400.70x = 647,101.05 × 406,906.30
  4. Step 4: Simplify right side
    431,400.70x = 263,309,493,981.62
  5. Step 5: Solve for x
    x = 263,309,493,981.62/431,400.70
  6. Step 6: Final answer
    x = 610,359.45

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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.