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Finding the Fourth Proportional to 414,077.62, 621,116.81 and 129,790.40

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Solution

The fourth proportional to 414,077.62, 621,116.81 and 129,790.40 is: 194,685.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,077.62 : 621,116.81 = 129,790.40 : x
  2. Step 2: Convert to fraction form
    414,077.62/621,116.81 = 129,790.40/x
  3. Step 3: Cross multiply
    414,077.62x = 621,116.81 × 129,790.40
  4. Step 4: Simplify right side
    414,077.62x = 80,614,999,442.58
  5. Step 5: Solve for x
    x = 80,614,999,442.58/414,077.62
  6. Step 6: Final answer
    x = 194,685.72

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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.