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Finding the Fourth Proportional to 1,212.21, 1,817.06 and 635.49

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Solution

The fourth proportional to 1,212.21, 1,817.06 and 635.49 is: 952.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.21 : 1,817.06 = 635.49 : x
  2. Step 2: Convert to fraction form
    1,212.21/1,817.06 = 635.49/x
  3. Step 3: Cross multiply
    1,212.21x = 1,817.06 × 635.49
  4. Step 4: Simplify right side
    1,212.21x = 1,154,720.28
  5. Step 5: Solve for x
    x = 1,154,720.28/1,212.21
  6. Step 6: Final answer
    x = 952.57

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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.