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Finding the Fourth Proportional to 414,000.45, 621,000.68 and 414,000.45

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Solution

The fourth proportional to 414,000.45, 621,000.68 and 414,000.45 is: 621,000.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,000.45 : 621,000.68 = 414,000.45 : x
  2. Step 2: Convert to fraction form
    414,000.45/621,000.68 = 414,000.45/x
  3. Step 3: Cross multiply
    414,000.45x = 621,000.68 × 414,000.45
  4. Step 4: Simplify right side
    414,000.45x = 257,094,558,900.30
  5. Step 5: Solve for x
    x = 257,094,558,900.30/414,000.45
  6. Step 6: Final answer
    x = 621,000.68

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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.