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Finding the Fourth Proportional to 343,285.14, 514,857.31 and 129,979.47

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Solution

The fourth proportional to 343,285.14, 514,857.31 and 129,979.47 is: 194,942.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,285.14 : 514,857.31 = 129,979.47 : x
  2. Step 2: Convert to fraction form
    343,285.14/514,857.31 = 129,979.47/x
  3. Step 3: Cross multiply
    343,285.14x = 514,857.31 × 129,979.47
  4. Step 4: Simplify right side
    343,285.14x = 66,920,879,720.25
  5. Step 5: Solve for x
    x = 66,920,879,720.25/343,285.14
  6. Step 6: Final answer
    x = 194,942.55

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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.