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Finding the Fourth Proportional to 648.09, 894.37 and 386.12

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Solution

The fourth proportional to 648.09, 894.37 and 386.12 is: 532.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.09 : 894.37 = 386.12 : x
  2. Step 2: Convert to fraction form
    648.09/894.37 = 386.12/x
  3. Step 3: Cross multiply
    648.09x = 894.37 × 386.12
  4. Step 4: Simplify right side
    648.09x = 345,334.14
  5. Step 5: Solve for x
    x = 345,334.14/648.09
  6. Step 6: Final answer
    x = 532.85

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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.