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Finding the Fourth Proportional to 1,193.46, 1,647 and 669.66

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Solution

The fourth proportional to 1,193.46, 1,647 and 669.66 is: 924.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.46 : 1,647 = 669.66 : x
  2. Step 2: Convert to fraction form
    1,193.46/1,647 = 669.66/x
  3. Step 3: Cross multiply
    1,193.46x = 1,647 × 669.66
  4. Step 4: Simplify right side
    1,193.46x = 1,102,930.02
  5. Step 5: Solve for x
    x = 1,102,930.02/1,193.46
  6. Step 6: Final answer
    x = 924.14

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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.