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Finding the Fourth Proportional to 937,318.80, 1,405,978.20 and 686,643.60

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Solution

The fourth proportional to 937,318.80, 1,405,978.20 and 686,643.60 is: 1,029,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    937,318.80 : 1,405,978.20 = 686,643.60 : x
  2. Step 2: Convert to fraction form
    937,318.80/1,405,978.20 = 686,643.60/x
  3. Step 3: Cross multiply
    937,318.80x = 1,405,978.20 × 686,643.60
  4. Step 4: Simplify right side
    937,318.80x = 965,405,932,769.52
  5. Step 5: Solve for x
    x = 965,405,932,769.52/937,318.80
  6. Step 6: Final answer
    x = 1,029,965.40

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