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Finding the Fourth Proportional to 1,963.65, 2,945.28 and 665.10

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Solution

The fourth proportional to 1,963.65, 2,945.28 and 665.10 is: 997.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,963.65 : 2,945.28 = 665.10 : x
  2. Step 2: Convert to fraction form
    1,963.65/2,945.28 = 665.10/x
  3. Step 3: Cross multiply
    1,963.65x = 2,945.28 × 665.10
  4. Step 4: Simplify right side
    1,963.65x = 1,958,905.73
  5. Step 5: Solve for x
    x = 1,958,905.73/1,963.65
  6. Step 6: Final answer
    x = 997.58

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1.5x scale

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.