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Finding the Fourth Proportional to 705,696.42, 973,790.72 and 399,711.72

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Solution

The fourth proportional to 705,696.42, 973,790.72 and 399,711.72 is: 551,562.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,696.42 : 973,790.72 = 399,711.72 : x
  2. Step 2: Convert to fraction form
    705,696.42/973,790.72 = 399,711.72/x
  3. Step 3: Cross multiply
    705,696.42x = 973,790.72 × 399,711.72
  4. Step 4: Simplify right side
    705,696.42x = 389,235,563,611.24
  5. Step 5: Solve for x
    x = 389,235,563,611.24/705,696.42
  6. Step 6: Final answer
    x = 551,562.33

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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.