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Finding the Fourth Proportional to 1,176.38, 1,765.28 and 446.57

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Solution

The fourth proportional to 1,176.38, 1,765.28 and 446.57 is: 670.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.38 : 1,765.28 = 446.57 : x
  2. Step 2: Convert to fraction form
    1,176.38/1,765.28 = 446.57/x
  3. Step 3: Cross multiply
    1,176.38x = 1,765.28 × 446.57
  4. Step 4: Simplify right side
    1,176.38x = 788,321.09
  5. Step 5: Solve for x
    x = 788,321.09/1,176.38
  6. Step 6: Final answer
    x = 670.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.