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Finding the Fourth Proportional to 443,753.80, 665,630.70 and 393,890.20

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Solution

The fourth proportional to 443,753.80, 665,630.70 and 393,890.20 is: 590,835.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,753.80 : 665,630.70 = 393,890.20 : x
  2. Step 2: Convert to fraction form
    443,753.80/665,630.70 = 393,890.20/x
  3. Step 3: Cross multiply
    443,753.80x = 665,630.70 × 393,890.20
  4. Step 4: Simplify right side
    443,753.80x = 262,185,409,549.14
  5. Step 5: Solve for x
    x = 262,185,409,549.14/443,753.80
  6. Step 6: Final answer
    x = 590,835.30

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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.