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Finding the Fourth Proportional to 4,478.72, 6,720.28 and 2,015.28

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Solution

The fourth proportional to 4,478.72, 6,720.28 and 2,015.28 is: 3,023.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.72 : 6,720.28 = 2,015.28 : x
  2. Step 2: Convert to fraction form
    4,478.72/6,720.28 = 2,015.28/x
  3. Step 3: Cross multiply
    4,478.72x = 6,720.28 × 2,015.28
  4. Step 4: Simplify right side
    4,478.72x = 13,543,245.88
  5. Step 5: Solve for x
    x = 13,543,245.88/4,478.72
  6. Step 6: Final answer
    x = 3,023.91

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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.