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Finding the Fourth Proportional to 648.43, 971.82 and 283.12

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Solution

The fourth proportional to 648.43, 971.82 and 283.12 is: 424.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.43 : 971.82 = 283.12 : x
  2. Step 2: Convert to fraction form
    648.43/971.82 = 283.12/x
  3. Step 3: Cross multiply
    648.43x = 971.82 × 283.12
  4. Step 4: Simplify right side
    648.43x = 275,141.68
  5. Step 5: Solve for x
    x = 275,141.68/648.43
  6. Step 6: Final answer
    x = 424.32

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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.