Home / 428,079.90-642,126.09-203,463.24

Finding the Fourth Proportional to 428,079.90, 642,126.09 and 203,463.24

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Solution

The fourth proportional to 428,079.90, 642,126.09 and 203,463.24 is: 305,197.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,079.90 : 642,126.09 = 203,463.24 : x
  2. Step 2: Convert to fraction form
    428,079.90/642,126.09 = 203,463.24/x
  3. Step 3: Cross multiply
    428,079.90x = 642,126.09 × 203,463.24
  4. Step 4: Simplify right side
    428,079.90x = 130,649,054,759.93
  5. Step 5: Solve for x
    x = 130,649,054,759.93/428,079.90
  6. Step 6: Final answer
    x = 305,197.83

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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.