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Finding the Fourth Proportional to 648.05, 894.31 and 353.31

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Solution

The fourth proportional to 648.05, 894.31 and 353.31 is: 487.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.05 : 894.31 = 353.31 : x
  2. Step 2: Convert to fraction form
    648.05/894.31 = 353.31/x
  3. Step 3: Cross multiply
    648.05x = 894.31 × 353.31
  4. Step 4: Simplify right side
    648.05x = 315,968.67
  5. Step 5: Solve for x
    x = 315,968.67/648.05
  6. Step 6: Final answer
    x = 487.57

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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.