Home / 428,542.20-642,813.30-359,076.60

Finding the Fourth Proportional to 428,542.20, 642,813.30 and 359,076.60

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Solution

The fourth proportional to 428,542.20, 642,813.30 and 359,076.60 is: 538,614.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,542.20 : 642,813.30 = 359,076.60 : x
  2. Step 2: Convert to fraction form
    428,542.20/642,813.30 = 359,076.60/x
  3. Step 3: Cross multiply
    428,542.20x = 642,813.30 × 359,076.60
  4. Step 4: Simplify right side
    428,542.20x = 230,819,214,198.78
  5. Step 5: Solve for x
    x = 230,819,214,198.78/428,542.20
  6. Step 6: Final answer
    x = 538,614.90

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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.