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Finding the Fourth Proportional to 648.91, 894.94 and 439.03

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Solution

The fourth proportional to 648.91, 894.94 and 439.03 is: 605.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.91 : 894.94 = 439.03 : x
  2. Step 2: Convert to fraction form
    648.91/894.94 = 439.03/x
  3. Step 3: Cross multiply
    648.91x = 894.94 × 439.03
  4. Step 4: Simplify right side
    648.91x = 392,905.51
  5. Step 5: Solve for x
    x = 392,905.51/648.91
  6. Step 6: Final answer
    x = 605.49

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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.