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Finding the Fourth Proportional to 607.92, 911.24 and 315.11

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Solution

The fourth proportional to 607.92, 911.24 and 315.11 is: 472.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.92 : 911.24 = 315.11 : x
  2. Step 2: Convert to fraction form
    607.92/911.24 = 315.11/x
  3. Step 3: Cross multiply
    607.92x = 911.24 × 315.11
  4. Step 4: Simplify right side
    607.92x = 287,137.13
  5. Step 5: Solve for x
    x = 287,137.13/607.92
  6. Step 6: Final answer
    x = 472.33

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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.