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Finding the Fourth Proportional to 648.09, 971.52 and 214.96

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Solution

The fourth proportional to 648.09, 971.52 and 214.96 is: 322.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.09 : 971.52 = 214.96 : x
  2. Step 2: Convert to fraction form
    648.09/971.52 = 214.96/x
  3. Step 3: Cross multiply
    648.09x = 971.52 × 214.96
  4. Step 4: Simplify right side
    648.09x = 208,837.94
  5. Step 5: Solve for x
    x = 208,837.94/648.09
  6. Step 6: Final answer
    x = 322.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.