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Finding the Fourth Proportional to 783.33, 1,174.58 and 320.97

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Solution

The fourth proportional to 783.33, 1,174.58 and 320.97 is: 481.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.33 : 1,174.58 = 320.97 : x
  2. Step 2: Convert to fraction form
    783.33/1,174.58 = 320.97/x
  3. Step 3: Cross multiply
    783.33x = 1,174.58 × 320.97
  4. Step 4: Simplify right side
    783.33x = 377,003.34
  5. Step 5: Solve for x
    x = 377,003.34/783.33
  6. Step 6: Final answer
    x = 481.28

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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.