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Finding the Fourth Proportional to 722.43, 996.87 and 407.67

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Solution

The fourth proportional to 722.43, 996.87 and 407.67 is: 562.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.43 : 996.87 = 407.67 : x
  2. Step 2: Convert to fraction form
    722.43/996.87 = 407.67/x
  3. Step 3: Cross multiply
    722.43x = 996.87 × 407.67
  4. Step 4: Simplify right side
    722.43x = 406,393.99
  5. Step 5: Solve for x
    x = 406,393.99/722.43
  6. Step 6: Final answer
    x = 562.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.