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Finding the Fourth Proportional to 339,713.55, 509,568.50 and 86,993.55

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Solution

The fourth proportional to 339,713.55, 509,568.50 and 86,993.55 is: 130,489.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,713.55 : 509,568.50 = 86,993.55 : x
  2. Step 2: Convert to fraction form
    339,713.55/509,568.50 = 86,993.55/x
  3. Step 3: Cross multiply
    339,713.55x = 509,568.50 × 86,993.55
  4. Step 4: Simplify right side
    339,713.55x = 44,329,173,000.66
  5. Step 5: Solve for x
    x = 44,329,173,000.66/339,713.55
  6. Step 6: Final answer
    x = 130,489.86

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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.