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Finding the Fourth Proportional to 648.21, 972.46 and 185.99

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Solution

The fourth proportional to 648.21, 972.46 and 185.99 is: 279.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.21 : 972.46 = 185.99 : x
  2. Step 2: Convert to fraction form
    648.21/972.46 = 185.99/x
  3. Step 3: Cross multiply
    648.21x = 972.46 × 185.99
  4. Step 4: Simplify right side
    648.21x = 180,867.84
  5. Step 5: Solve for x
    x = 180,867.84/648.21
  6. Step 6: Final answer
    x = 279.03

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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.