Home / 428,771.32-643,131-192,050.44

Finding the Fourth Proportional to 428,771.32, 643,131 and 192,050.44

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Solution

The fourth proportional to 428,771.32, 643,131 and 192,050.44 is: 288,064.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,771.32 : 643,131 = 192,050.44 : x
  2. Step 2: Convert to fraction form
    428,771.32/643,131 = 192,050.44/x
  3. Step 3: Cross multiply
    428,771.32x = 643,131 × 192,050.44
  4. Step 4: Simplify right side
    428,771.32x = 123,513,591,527.64
  5. Step 5: Solve for x
    x = 123,513,591,527.64/428,771.32
  6. Step 6: Final answer
    x = 288,064.02

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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.