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Finding the Fourth Proportional to 783.20, 1,171.92 and 441.44

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Solution

The fourth proportional to 783.20, 1,171.92 and 441.44 is: 660.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.20 : 1,171.92 = 441.44 : x
  2. Step 2: Convert to fraction form
    783.20/1,171.92 = 441.44/x
  3. Step 3: Cross multiply
    783.20x = 1,171.92 × 441.44
  4. Step 4: Simplify right side
    783.20x = 517,332.36
  5. Step 5: Solve for x
    x = 517,332.36/783.20
  6. Step 6: Final answer
    x = 660.54

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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.