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Finding the Fourth Proportional to 1,214.82, 1,676.52 and 717.12

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Solution

The fourth proportional to 1,214.82, 1,676.52 and 717.12 is: 989.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.82 : 1,676.52 = 717.12 : x
  2. Step 2: Convert to fraction form
    1,214.82/1,676.52 = 717.12/x
  3. Step 3: Cross multiply
    1,214.82x = 1,676.52 × 717.12
  4. Step 4: Simplify right side
    1,214.82x = 1,202,266.02
  5. Step 5: Solve for x
    x = 1,202,266.02/1,214.82
  6. Step 6: Final answer
    x = 989.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.