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Finding the Fourth Proportional to 6,276.80, 9,415.20 and 4,527.20

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Solution

The fourth proportional to 6,276.80, 9,415.20 and 4,527.20 is: 6,790.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,276.80 : 9,415.20 = 4,527.20 : x
  2. Step 2: Convert to fraction form
    6,276.80/9,415.20 = 4,527.20/x
  3. Step 3: Cross multiply
    6,276.80x = 9,415.20 × 4,527.20
  4. Step 4: Simplify right side
    6,276.80x = 42,624,493.44
  5. Step 5: Solve for x
    x = 42,624,493.44/6,276.80
  6. Step 6: Final answer
    x = 6,790.80

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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.