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Finding the Fourth Proportional to 3,156.75, 4,734.93 and 965.28

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Solution

The fourth proportional to 3,156.75, 4,734.93 and 965.28 is: 1,447.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.75 : 4,734.93 = 965.28 : x
  2. Step 2: Convert to fraction form
    3,156.75/4,734.93 = 965.28/x
  3. Step 3: Cross multiply
    3,156.75x = 4,734.93 × 965.28
  4. Step 4: Simplify right side
    3,156.75x = 4,570,533.23
  5. Step 5: Solve for x
    x = 4,570,533.23/3,156.75
  6. Step 6: Final answer
    x = 1,447.86

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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.