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Finding the Fourth Proportional to 705,382.12, 973,487.37 and 399,512.92

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Solution

The fourth proportional to 705,382.12, 973,487.37 and 399,512.92 is: 551,361.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,382.12 : 973,487.37 = 399,512.92 : x
  2. Step 2: Convert to fraction form
    705,382.12/973,487.37 = 399,512.92/x
  3. Step 3: Cross multiply
    705,382.12x = 973,487.37 × 399,512.92
  4. Step 4: Simplify right side
    705,382.12x = 388,920,781,771.82
  5. Step 5: Solve for x
    x = 388,920,781,771.82/705,382.12
  6. Step 6: Final answer
    x = 551,361.84

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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.