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Finding the Fourth Proportional to 3,193.89, 4,791.51 and 972.79

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Solution

The fourth proportional to 3,193.89, 4,791.51 and 972.79 is: 1,459.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,193.89 : 4,791.51 = 972.79 : x
  2. Step 2: Convert to fraction form
    3,193.89/4,791.51 = 972.79/x
  3. Step 3: Cross multiply
    3,193.89x = 4,791.51 × 972.79
  4. Step 4: Simplify right side
    3,193.89x = 4,661,133.01
  5. Step 5: Solve for x
    x = 4,661,133.01/3,193.89
  6. Step 6: Final answer
    x = 1,459.39

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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.