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Finding the Fourth Proportional to 911.70, 1,367.58 and 603.51

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Solution

The fourth proportional to 911.70, 1,367.58 and 603.51 is: 905.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.70 : 1,367.58 = 603.51 : x
  2. Step 2: Convert to fraction form
    911.70/1,367.58 = 603.51/x
  3. Step 3: Cross multiply
    911.70x = 1,367.58 × 603.51
  4. Step 4: Simplify right side
    911.70x = 825,348.21
  5. Step 5: Solve for x
    x = 825,348.21/911.70
  6. Step 6: Final answer
    x = 905.28

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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.