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Finding the Fourth Proportional to 468,428.20, 702,569.40 and 131,435.80

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Solution

The fourth proportional to 468,428.20, 702,569.40 and 131,435.80 is: 197,133.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,428.20 : 702,569.40 = 131,435.80 : x
  2. Step 2: Convert to fraction form
    468,428.20/702,569.40 = 131,435.80/x
  3. Step 3: Cross multiply
    468,428.20x = 702,569.40 × 131,435.80
  4. Step 4: Simplify right side
    468,428.20x = 92,342,771,144.52
  5. Step 5: Solve for x
    x = 92,342,771,144.52/468,428.20
  6. Step 6: Final answer
    x = 197,133.25

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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.