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Finding the Fourth Proportional to 911.58, 1,367.10 and 500.91

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Solution

The fourth proportional to 911.58, 1,367.10 and 500.91 is: 751.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.58 : 1,367.10 = 500.91 : x
  2. Step 2: Convert to fraction form
    911.58/1,367.10 = 500.91/x
  3. Step 3: Cross multiply
    911.58x = 1,367.10 × 500.91
  4. Step 4: Simplify right side
    911.58x = 684,794.06
  5. Step 5: Solve for x
    x = 684,794.06/911.58
  6. Step 6: Final answer
    x = 751.22

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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.