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Finding the Fourth Proportional to 1,193.57, 1,647.12 and 669.60

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Solution

The fourth proportional to 1,193.57, 1,647.12 and 669.60 is: 924.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.57 : 1,647.12 = 669.60 : x
  2. Step 2: Convert to fraction form
    1,193.57/1,647.12 = 669.60/x
  3. Step 3: Cross multiply
    1,193.57x = 1,647.12 × 669.60
  4. Step 4: Simplify right side
    1,193.57x = 1,102,911.55
  5. Step 5: Solve for x
    x = 1,102,911.55/1,193.57
  6. Step 6: Final answer
    x = 924.04

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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.