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Finding the Fourth Proportional to 705,107.40, 973,059.60 and 399,175.80

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Solution

The fourth proportional to 705,107.40, 973,059.60 and 399,175.80 is: 550,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,107.40 : 973,059.60 = 399,175.80 : x
  2. Step 2: Convert to fraction form
    705,107.40/973,059.60 = 399,175.80/x
  3. Step 3: Cross multiply
    705,107.40x = 973,059.60 × 399,175.80
  4. Step 4: Simplify right side
    705,107.40x = 388,421,844,277.68
  5. Step 5: Solve for x
    x = 388,421,844,277.68/705,107.40
  6. Step 6: Final answer
    x = 550,869.05

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Double scale
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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.