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Finding the Fourth Proportional to 1,214.33, 1,675.98 and 717.09

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Solution

The fourth proportional to 1,214.33, 1,675.98 and 717.09 is: 989.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.33 : 1,675.98 = 717.09 : x
  2. Step 2: Convert to fraction form
    1,214.33/1,675.98 = 717.09/x
  3. Step 3: Cross multiply
    1,214.33x = 1,675.98 × 717.09
  4. Step 4: Simplify right side
    1,214.33x = 1,201,828.50
  5. Step 5: Solve for x
    x = 1,201,828.50/1,214.33
  6. Step 6: Final answer
    x = 989.71

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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.