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Finding the Fourth Proportional to 611,145.18, 843,367.64 and 339,197.12

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Solution

The fourth proportional to 611,145.18, 843,367.64 and 339,197.12 is: 468,084.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,145.18 : 843,367.64 = 339,197.12 : x
  2. Step 2: Convert to fraction form
    611,145.18/843,367.64 = 339,197.12/x
  3. Step 3: Cross multiply
    611,145.18x = 843,367.64 × 339,197.12
  4. Step 4: Simplify right side
    611,145.18x = 286,067,874,589.20
  5. Step 5: Solve for x
    x = 286,067,874,589.20/611,145.18
  6. Step 6: Final answer
    x = 468,084.97

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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.