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Finding the Fourth Proportional to 1,976.39, 2,964.35 and 515.65

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Solution

The fourth proportional to 1,976.39, 2,964.35 and 515.65 is: 773.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.39 : 2,964.35 = 515.65 : x
  2. Step 2: Convert to fraction form
    1,976.39/2,964.35 = 515.65/x
  3. Step 3: Cross multiply
    1,976.39x = 2,964.35 × 515.65
  4. Step 4: Simplify right side
    1,976.39x = 1,528,579.38
  5. Step 5: Solve for x
    x = 1,528,579.38/1,976.39
  6. Step 6: Final answer
    x = 773.42

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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.