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Finding the Fourth Proportional to 3,943.70, 5,915.46 and 1,021.98

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Solution

The fourth proportional to 3,943.70, 5,915.46 and 1,021.98 is: 1,532.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.70 : 5,915.46 = 1,021.98 : x
  2. Step 2: Convert to fraction form
    3,943.70/5,915.46 = 1,021.98/x
  3. Step 3: Cross multiply
    3,943.70x = 5,915.46 × 1,021.98
  4. Step 4: Simplify right side
    3,943.70x = 6,045,481.81
  5. Step 5: Solve for x
    x = 6,045,481.81/3,943.70
  6. Step 6: Final answer
    x = 1,532.95

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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.