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Finding the Fourth Proportional to 1,193.38, 1,646.94 and 669.45

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Solution

The fourth proportional to 1,193.38, 1,646.94 and 669.45 is: 923.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.38 : 1,646.94 = 669.45 : x
  2. Step 2: Convert to fraction form
    1,193.38/1,646.94 = 669.45/x
  3. Step 3: Cross multiply
    1,193.38x = 1,646.94 × 669.45
  4. Step 4: Simplify right side
    1,193.38x = 1,102,535.75
  5. Step 5: Solve for x
    x = 1,102,535.75/1,193.38
  6. Step 6: Final answer
    x = 923.88

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Half scale
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1.5x scale

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.