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Finding the Fourth Proportional to 648.36, 894.60 and 382.86

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Solution

The fourth proportional to 648.36, 894.60 and 382.86 is: 528.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.36 : 894.60 = 382.86 : x
  2. Step 2: Convert to fraction form
    648.36/894.60 = 382.86/x
  3. Step 3: Cross multiply
    648.36x = 894.60 × 382.86
  4. Step 4: Simplify right side
    648.36x = 342,506.56
  5. Step 5: Solve for x
    x = 342,506.56/648.36
  6. Step 6: Final answer
    x = 528.27

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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.