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Finding the Fourth Proportional to 603,929.10, 905,893.65 and 393,977.10

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Solution

The fourth proportional to 603,929.10, 905,893.65 and 393,977.10 is: 590,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,929.10 : 905,893.65 = 393,977.10 : x
  2. Step 2: Convert to fraction form
    603,929.10/905,893.65 = 393,977.10/x
  3. Step 3: Cross multiply
    603,929.10x = 905,893.65 × 393,977.10
  4. Step 4: Simplify right side
    603,929.10x = 356,901,353,135.42
  5. Step 5: Solve for x
    x = 356,901,353,135.42/603,929.10
  6. Step 6: Final answer
    x = 590,965.65

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Similar ratio
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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.