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Finding the Fourth Proportional to 648.24, 894.60 and 386.28

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Solution

The fourth proportional to 648.24, 894.60 and 386.28 is: 533.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.24 : 894.60 = 386.28 : x
  2. Step 2: Convert to fraction form
    648.24/894.60 = 386.28/x
  3. Step 3: Cross multiply
    648.24x = 894.60 × 386.28
  4. Step 4: Simplify right side
    648.24x = 345,566.09
  5. Step 5: Solve for x
    x = 345,566.09/648.24
  6. Step 6: Final answer
    x = 533.08

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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.