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Finding the Fourth Proportional to 720,190.93, 993,851.83 and 393,496.94

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Solution

The fourth proportional to 720,190.93, 993,851.83 and 393,496.94 is: 543,019.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,190.93 : 993,851.83 = 393,496.94 : x
  2. Step 2: Convert to fraction form
    720,190.93/993,851.83 = 393,496.94/x
  3. Step 3: Cross multiply
    720,190.93x = 993,851.83 × 393,496.94
  4. Step 4: Simplify right side
    720,190.93x = 391,077,653,918.40
  5. Step 5: Solve for x
    x = 391,077,653,918.40/720,190.93
  6. Step 6: Final answer
    x = 543,019.41

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Double scale
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Similar ratio
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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.