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Finding the Fourth Proportional to 617,968.80, 928,508.40 and 393,436.80

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Solution

The fourth proportional to 617,968.80, 928,508.40 and 393,436.80 is: 591,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,968.80 : 928,508.40 = 393,436.80 : x
  2. Step 2: Convert to fraction form
    617,968.80/928,508.40 = 393,436.80/x
  3. Step 3: Cross multiply
    617,968.80x = 928,508.40 × 393,436.80
  4. Step 4: Simplify right side
    617,968.80x = 365,309,373,669.12
  5. Step 5: Solve for x
    x = 365,309,373,669.12/617,968.80
  6. Step 6: Final answer
    x = 591,145.34

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1.5x scale

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.