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Finding the Fourth Proportional to 312,217.05, 430,859.54 and 168,977.10

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Solution

The fourth proportional to 312,217.05, 430,859.54 and 168,977.10 is: 233,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,217.05 : 430,859.54 = 168,977.10 : x
  2. Step 2: Convert to fraction form
    312,217.05/430,859.54 = 168,977.10/x
  3. Step 3: Cross multiply
    312,217.05x = 430,859.54 × 168,977.10
  4. Step 4: Simplify right side
    312,217.05x = 72,805,394,240.62
  5. Step 5: Solve for x
    x = 72,805,394,240.62/312,217.05
  6. Step 6: Final answer
    x = 233,188.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.