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Finding the Fourth Proportional to 1,960.71, 2,941.94 and 987.49

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Solution

The fourth proportional to 1,960.71, 2,941.94 and 987.49 is: 1,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.71 : 2,941.94 = 987.49 : x
  2. Step 2: Convert to fraction form
    1,960.71/2,941.94 = 987.49/x
  3. Step 3: Cross multiply
    1,960.71x = 2,941.94 × 987.49
  4. Step 4: Simplify right side
    1,960.71x = 2,905,136.33
  5. Step 5: Solve for x
    x = 2,905,136.33/1,960.71
  6. Step 6: Final answer
    x = 1,481.68

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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.