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Finding the Fourth Proportional to 443,405.10, 665,205.93 and 127,837.38

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Solution

The fourth proportional to 443,405.10, 665,205.93 and 127,837.38 is: 191,784.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,405.10 : 665,205.93 = 127,837.38 : x
  2. Step 2: Convert to fraction form
    443,405.10/665,205.93 = 127,837.38/x
  3. Step 3: Cross multiply
    443,405.10x = 665,205.93 × 127,837.38
  4. Step 4: Simplify right side
    443,405.10x = 85,038,183,251.66
  5. Step 5: Solve for x
    x = 85,038,183,251.66/443,405.10
  6. Step 6: Final answer
    x = 191,784.40

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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.