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Finding the Fourth Proportional to 648.31, 894.50 and 415.57

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Solution

The fourth proportional to 648.31, 894.50 and 415.57 is: 573.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.31 : 894.50 = 415.57 : x
  2. Step 2: Convert to fraction form
    648.31/894.50 = 415.57/x
  3. Step 3: Cross multiply
    648.31x = 894.50 × 415.57
  4. Step 4: Simplify right side
    648.31x = 371,725.29
  5. Step 5: Solve for x
    x = 371,725.29/648.31
  6. Step 6: Final answer
    x = 573.38

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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.