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Finding the Fourth Proportional to 705,190.41, 973,152.81 and 399,258.90

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Solution

The fourth proportional to 705,190.41, 973,152.81 and 399,258.90 is: 550,971.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,190.41 : 973,152.81 = 399,258.90 : x
  2. Step 2: Convert to fraction form
    705,190.41/973,152.81 = 399,258.90/x
  3. Step 3: Cross multiply
    705,190.41x = 973,152.81 × 399,258.90
  4. Step 4: Simplify right side
    705,190.41x = 388,539,920,452.51
  5. Step 5: Solve for x
    x = 388,539,920,452.51/705,190.41
  6. Step 6: Final answer
    x = 550,971.65

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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.