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Finding the Fourth Proportional to 443,438.20, 665,157.30 and 256,353.40

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Solution

The fourth proportional to 443,438.20, 665,157.30 and 256,353.40 is: 384,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,438.20 : 665,157.30 = 256,353.40 : x
  2. Step 2: Convert to fraction form
    443,438.20/665,157.30 = 256,353.40/x
  3. Step 3: Cross multiply
    443,438.20x = 665,157.30 × 256,353.40
  4. Step 4: Simplify right side
    443,438.20x = 170,515,335,389.82
  5. Step 5: Solve for x
    x = 170,515,335,389.82/443,438.20
  6. Step 6: Final answer
    x = 384,530.10

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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.