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Finding the Fourth Proportional to 3,959.48, 5,946.91 and 2,915.36

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Solution

The fourth proportional to 3,959.48, 5,946.91 and 2,915.36 is: 4,378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.48 : 5,946.91 = 2,915.36 : x
  2. Step 2: Convert to fraction form
    3,959.48/5,946.91 = 2,915.36/x
  3. Step 3: Cross multiply
    3,959.48x = 5,946.91 × 2,915.36
  4. Step 4: Simplify right side
    3,959.48x = 17,337,398.26
  5. Step 5: Solve for x
    x = 17,337,398.26/3,959.48
  6. Step 6: Final answer
    x = 4,378.70

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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.