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Finding the Fourth Proportional to 261,918.74, 361,491.72 and 154,515.44

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Solution

The fourth proportional to 261,918.74, 361,491.72 and 154,515.44 is: 213,257.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,918.74 : 361,491.72 = 154,515.44 : x
  2. Step 2: Convert to fraction form
    261,918.74/361,491.72 = 154,515.44/x
  3. Step 3: Cross multiply
    261,918.74x = 361,491.72 × 154,515.44
  4. Step 4: Simplify right side
    261,918.74x = 55,856,052,172.16
  5. Step 5: Solve for x
    x = 55,856,052,172.16/261,918.74
  6. Step 6: Final answer
    x = 213,257.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.