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Finding the Fourth Proportional to 629.86, 943.70 and 486.22

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Solution

The fourth proportional to 629.86, 943.70 and 486.22 is: 728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.86 : 943.70 = 486.22 : x
  2. Step 2: Convert to fraction form
    629.86/943.70 = 486.22/x
  3. Step 3: Cross multiply
    629.86x = 943.70 × 486.22
  4. Step 4: Simplify right side
    629.86x = 458,845.81
  5. Step 5: Solve for x
    x = 458,845.81/629.86
  6. Step 6: Final answer
    x = 728.49

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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.