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Finding the Fourth Proportional to 414,911.40, 622,367.10 and 407,999.40

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Solution

The fourth proportional to 414,911.40, 622,367.10 and 407,999.40 is: 611,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,911.40 : 622,367.10 = 407,999.40 : x
  2. Step 2: Convert to fraction form
    414,911.40/622,367.10 = 407,999.40/x
  3. Step 3: Cross multiply
    414,911.40x = 622,367.10 × 407,999.40
  4. Step 4: Simplify right side
    414,911.40x = 253,925,403,379.74
  5. Step 5: Solve for x
    x = 253,925,403,379.74/414,911.40
  6. Step 6: Final answer
    x = 611,999.10

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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.