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Finding the Fourth Proportional to 3,096.61, 4,645.33 and 905.31

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Solution

The fourth proportional to 3,096.61, 4,645.33 and 905.31 is: 1,358.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,096.61 : 4,645.33 = 905.31 : x
  2. Step 2: Convert to fraction form
    3,096.61/4,645.33 = 905.31/x
  3. Step 3: Cross multiply
    3,096.61x = 4,645.33 × 905.31
  4. Step 4: Simplify right side
    3,096.61x = 4,205,461.44
  5. Step 5: Solve for x
    x = 4,205,461.44/3,096.61
  6. Step 6: Final answer
    x = 1,358.09

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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.