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Finding the Fourth Proportional to 3,943.84, 5,915.53 and 1,478.46

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Solution

The fourth proportional to 3,943.84, 5,915.53 and 1,478.46 is: 2,217.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.84 : 5,915.53 = 1,478.46 : x
  2. Step 2: Convert to fraction form
    3,943.84/5,915.53 = 1,478.46/x
  3. Step 3: Cross multiply
    3,943.84x = 5,915.53 × 1,478.46
  4. Step 4: Simplify right side
    3,943.84x = 8,745,837.51
  5. Step 5: Solve for x
    x = 8,745,837.51/3,943.84
  6. Step 6: Final answer
    x = 2,217.59

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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.