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Finding the Fourth Proportional to 1,173.82, 1,620 and 676.66

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Solution

The fourth proportional to 1,173.82, 1,620 and 676.66 is: 933.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.82 : 1,620 = 676.66 : x
  2. Step 2: Convert to fraction form
    1,173.82/1,620 = 676.66/x
  3. Step 3: Cross multiply
    1,173.82x = 1,620 × 676.66
  4. Step 4: Simplify right side
    1,173.82x = 1,096,189.20
  5. Step 5: Solve for x
    x = 1,096,189.20/1,173.82
  6. Step 6: Final answer
    x = 933.86

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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.