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Finding the Fourth Proportional to 648.26, 893.89 and 438.07

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Solution

The fourth proportional to 648.26, 893.89 and 438.07 is: 604.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.26 : 893.89 = 438.07 : x
  2. Step 2: Convert to fraction form
    648.26/893.89 = 438.07/x
  3. Step 3: Cross multiply
    648.26x = 893.89 × 438.07
  4. Step 4: Simplify right side
    648.26x = 391,585.15
  5. Step 5: Solve for x
    x = 391,585.15/648.26
  6. Step 6: Final answer
    x = 604.06

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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.