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Finding the Fourth Proportional to 339,688.20, 509,532.30 and 171,726.60

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Solution

The fourth proportional to 339,688.20, 509,532.30 and 171,726.60 is: 257,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,688.20 : 509,532.30 = 171,726.60 : x
  2. Step 2: Convert to fraction form
    339,688.20/509,532.30 = 171,726.60/x
  3. Step 3: Cross multiply
    339,688.20x = 509,532.30 × 171,726.60
  4. Step 4: Simplify right side
    339,688.20x = 87,500,249,469.18
  5. Step 5: Solve for x
    x = 87,500,249,469.18/339,688.20
  6. Step 6: Final answer
    x = 257,589.90

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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.