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Finding the Fourth Proportional to 712,808, 983,675.04 and 394,856

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Solution

The fourth proportional to 712,808, 983,675.04 and 394,856 is: 544,901.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,808 : 983,675.04 = 394,856 : x
  2. Step 2: Convert to fraction form
    712,808/983,675.04 = 394,856/x
  3. Step 3: Cross multiply
    712,808x = 983,675.04 × 394,856
  4. Step 4: Simplify right side
    712,808x = 388,409,991,594.24
  5. Step 5: Solve for x
    x = 388,409,991,594.24/712,808
  6. Step 6: Final answer
    x = 544,901.28

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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.