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Finding the Fourth Proportional to 2,913.28, 4,369.92 and 965.63

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Solution

The fourth proportional to 2,913.28, 4,369.92 and 965.63 is: 1,448.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.28 : 4,369.92 = 965.63 : x
  2. Step 2: Convert to fraction form
    2,913.28/4,369.92 = 965.63/x
  3. Step 3: Cross multiply
    2,913.28x = 4,369.92 × 965.63
  4. Step 4: Simplify right side
    2,913.28x = 4,219,725.85
  5. Step 5: Solve for x
    x = 4,219,725.85/2,913.28
  6. Step 6: Final answer
    x = 1,448.45

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1.5x scale

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.