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Finding the Fourth Proportional to 617,977.80, 928,521.90 and 393,445.80

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Solution

The fourth proportional to 617,977.80, 928,521.90 and 393,445.80 is: 591,158.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,977.80 : 928,521.90 = 393,445.80 : x
  2. Step 2: Convert to fraction form
    617,977.80/928,521.90 = 393,445.80/x
  3. Step 3: Cross multiply
    617,977.80x = 928,521.90 × 393,445.80
  4. Step 4: Simplify right side
    617,977.80x = 365,323,041,763.02
  5. Step 5: Solve for x
    x = 365,323,041,763.02/617,977.80
  6. Step 6: Final answer
    x = 591,158.84

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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.