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Finding the Fourth Proportional to 991,976.80, 1,487,965.20 and 593,845.60

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Solution

The fourth proportional to 991,976.80, 1,487,965.20 and 593,845.60 is: 890,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,976.80 : 1,487,965.20 = 593,845.60 : x
  2. Step 2: Convert to fraction form
    991,976.80/1,487,965.20 = 593,845.60/x
  3. Step 3: Cross multiply
    991,976.80x = 1,487,965.20 × 593,845.60
  4. Step 4: Simplify right side
    991,976.80x = 883,621,586,973.12
  5. Step 5: Solve for x
    x = 883,621,586,973.12/991,976.80
  6. Step 6: Final answer
    x = 890,768.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.