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Finding the Fourth Proportional to 443,980.56, 665,967.18 and 191,439.56

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Solution

The fourth proportional to 443,980.56, 665,967.18 and 191,439.56 is: 287,157.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,980.56 : 665,967.18 = 191,439.56 : x
  2. Step 2: Convert to fraction form
    443,980.56/665,967.18 = 191,439.56/x
  3. Step 3: Cross multiply
    443,980.56x = 665,967.18 × 191,439.56
  4. Step 4: Simplify right side
    443,980.56x = 127,492,463,913.64
  5. Step 5: Solve for x
    x = 127,492,463,913.64/443,980.56
  6. Step 6: Final answer
    x = 287,157.76

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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.