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Finding the Fourth Proportional to 639,016.10, 957,710.10 and 339,640.10

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Solution

The fourth proportional to 639,016.10, 957,710.10 and 339,640.10 is: 509,027.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,016.10 : 957,710.10 = 339,640.10 : x
  2. Step 2: Convert to fraction form
    639,016.10/957,710.10 = 339,640.10/x
  3. Step 3: Cross multiply
    639,016.10x = 957,710.10 × 339,640.10
  4. Step 4: Simplify right side
    639,016.10x = 325,276,754,135.01
  5. Step 5: Solve for x
    x = 325,276,754,135.01/639,016.10
  6. Step 6: Final answer
    x = 509,027.48

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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.