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Finding the Fourth Proportional to 2,996.60, 4,493.76 and 915.97

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Solution

The fourth proportional to 2,996.60, 4,493.76 and 915.97 is: 1,373.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,996.60 : 4,493.76 = 915.97 : x
  2. Step 2: Convert to fraction form
    2,996.60/4,493.76 = 915.97/x
  3. Step 3: Cross multiply
    2,996.60x = 4,493.76 × 915.97
  4. Step 4: Simplify right side
    2,996.60x = 4,116,149.35
  5. Step 5: Solve for x
    x = 4,116,149.35/2,996.60
  6. Step 6: Final answer
    x = 1,373.61

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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.