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Finding the Fourth Proportional to 648.01, 894.22 and 395.89

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Solution

The fourth proportional to 648.01, 894.22 and 395.89 is: 546.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.01 : 894.22 = 395.89 : x
  2. Step 2: Convert to fraction form
    648.01/894.22 = 395.89/x
  3. Step 3: Cross multiply
    648.01x = 894.22 × 395.89
  4. Step 4: Simplify right side
    648.01x = 354,012.45
  5. Step 5: Solve for x
    x = 354,012.45/648.01
  6. Step 6: Final answer
    x = 546.31

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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.