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Finding the Fourth Proportional to 362,439.80, 543,659.70 and 287,790.20

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Solution

The fourth proportional to 362,439.80, 543,659.70 and 287,790.20 is: 431,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,439.80 : 543,659.70 = 287,790.20 : x
  2. Step 2: Convert to fraction form
    362,439.80/543,659.70 = 287,790.20/x
  3. Step 3: Cross multiply
    362,439.80x = 543,659.70 × 287,790.20
  4. Step 4: Simplify right side
    362,439.80x = 156,459,933,794.94
  5. Step 5: Solve for x
    x = 156,459,933,794.94/362,439.80
  6. Step 6: Final answer
    x = 431,685.30

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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.