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Finding the Fourth Proportional to 648.15, 971.41 and 323.61

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Solution

The fourth proportional to 648.15, 971.41 and 323.61 is: 485.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.15 : 971.41 = 323.61 : x
  2. Step 2: Convert to fraction form
    648.15/971.41 = 323.61/x
  3. Step 3: Cross multiply
    648.15x = 971.41 × 323.61
  4. Step 4: Simplify right side
    648.15x = 314,359.61
  5. Step 5: Solve for x
    x = 314,359.61/648.15
  6. Step 6: Final answer
    x = 485.01

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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.