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Finding the Fourth Proportional to 5,431.28, 8,148.28 and 2,965.44

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Solution

The fourth proportional to 5,431.28, 8,148.28 and 2,965.44 is: 4,448.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.28 : 8,148.28 = 2,965.44 : x
  2. Step 2: Convert to fraction form
    5,431.28/8,148.28 = 2,965.44/x
  3. Step 3: Cross multiply
    5,431.28x = 8,148.28 × 2,965.44
  4. Step 4: Simplify right side
    5,431.28x = 24,163,235.44
  5. Step 5: Solve for x
    x = 24,163,235.44/5,431.28
  6. Step 6: Final answer
    x = 4,448.90

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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.