Home / 428,292.80-642,077.94-270,172.70

Finding the Fourth Proportional to 428,292.80, 642,077.94 and 270,172.70

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Solution

The fourth proportional to 428,292.80, 642,077.94 and 270,172.70 is: 405,031.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,292.80 : 642,077.94 = 270,172.70 : x
  2. Step 2: Convert to fraction form
    428,292.80/642,077.94 = 270,172.70/x
  3. Step 3: Cross multiply
    428,292.80x = 642,077.94 × 270,172.70
  4. Step 4: Simplify right side
    428,292.80x = 173,471,930,660.24
  5. Step 5: Solve for x
    x = 173,471,930,660.24/428,292.80
  6. Step 6: Final answer
    x = 405,031.16

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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.