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Finding the Fourth Proportional to 6,409.20, 9,619.20 and 2,516.40

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Solution

The fourth proportional to 6,409.20, 9,619.20 and 2,516.40 is: 3,776.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.20 : 9,619.20 = 2,516.40 : x
  2. Step 2: Convert to fraction form
    6,409.20/9,619.20 = 2,516.40/x
  3. Step 3: Cross multiply
    6,409.20x = 9,619.20 × 2,516.40
  4. Step 4: Simplify right side
    6,409.20x = 24,205,754.88
  5. Step 5: Solve for x
    x = 24,205,754.88/6,409.20
  6. Step 6: Final answer
    x = 3,776.72

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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.