Home / 428,512.23-642,214.72-203,941.48

Finding the Fourth Proportional to 428,512.23, 642,214.72 and 203,941.48

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Solution

The fourth proportional to 428,512.23, 642,214.72 and 203,941.48 is: 305,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,512.23 : 642,214.72 = 203,941.48 : x
  2. Step 2: Convert to fraction form
    428,512.23/642,214.72 = 203,941.48/x
  3. Step 3: Cross multiply
    428,512.23x = 642,214.72 × 203,941.48
  4. Step 4: Simplify right side
    428,512.23x = 130,974,220,474.59
  5. Step 5: Solve for x
    x = 130,974,220,474.59/428,512.23
  6. Step 6: Final answer
    x = 305,648.73

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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.