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Finding the Fourth Proportional to 1,309.73, 1,963.35 and 487.44

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Solution

The fourth proportional to 1,309.73, 1,963.35 and 487.44 is: 730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.73 : 1,963.35 = 487.44 : x
  2. Step 2: Convert to fraction form
    1,309.73/1,963.35 = 487.44/x
  3. Step 3: Cross multiply
    1,309.73x = 1,963.35 × 487.44
  4. Step 4: Simplify right side
    1,309.73x = 957,022.06
  5. Step 5: Solve for x
    x = 957,022.06/1,309.73
  6. Step 6: Final answer
    x = 730.70

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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.