Home / 428,343.20-642,348.68-228,554.58

Finding the Fourth Proportional to 428,343.20, 642,348.68 and 228,554.58

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Solution

The fourth proportional to 428,343.20, 642,348.68 and 228,554.58 is: 342,743.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,343.20 : 642,348.68 = 228,554.58 : x
  2. Step 2: Convert to fraction form
    428,343.20/642,348.68 = 228,554.58/x
  3. Step 3: Cross multiply
    428,343.20x = 642,348.68 × 228,554.58
  4. Step 4: Simplify right side
    428,343.20x = 146,811,732,770.95
  5. Step 5: Solve for x
    x = 146,811,732,770.95/428,343.20
  6. Step 6: Final answer
    x = 342,743.24

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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.