Home / 428,732.20-643,328.70-179,439.40

Finding the Fourth Proportional to 428,732.20, 643,328.70 and 179,439.40

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Solution

The fourth proportional to 428,732.20, 643,328.70 and 179,439.40 is: 269,255.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,732.20 : 643,328.70 = 179,439.40 : x
  2. Step 2: Convert to fraction form
    428,732.20/643,328.70 = 179,439.40/x
  3. Step 3: Cross multiply
    428,732.20x = 643,328.70 × 179,439.40
  4. Step 4: Simplify right side
    428,732.20x = 115,438,515,930.78
  5. Step 5: Solve for x
    x = 115,438,515,930.78/428,732.20
  6. Step 6: Final answer
    x = 269,255.53

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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.