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Finding the Fourth Proportional to 719,930.94, 993,419.46 and 397,621.86

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Solution

The fourth proportional to 719,930.94, 993,419.46 and 397,621.86 is: 548,671.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,930.94 : 993,419.46 = 397,621.86 : x
  2. Step 2: Convert to fraction form
    719,930.94/993,419.46 = 397,621.86/x
  3. Step 3: Cross multiply
    719,930.94x = 993,419.46 × 397,621.86
  4. Step 4: Simplify right side
    719,930.94x = 395,005,293,445.40
  5. Step 5: Solve for x
    x = 395,005,293,445.40/719,930.94
  6. Step 6: Final answer
    x = 548,671.09

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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.