Home / 428,121.27-642,311.55-161,963.37

Finding the Fourth Proportional to 428,121.27, 642,311.55 and 161,963.37

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Solution

The fourth proportional to 428,121.27, 642,311.55 and 161,963.37 is: 242,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,121.27 : 642,311.55 = 161,963.37 : x
  2. Step 2: Convert to fraction form
    428,121.27/642,311.55 = 161,963.37/x
  3. Step 3: Cross multiply
    428,121.27x = 642,311.55 × 161,963.37
  4. Step 4: Simplify right side
    428,121.27x = 104,030,943,227.92
  5. Step 5: Solve for x
    x = 104,030,943,227.92/428,121.27
  6. Step 6: Final answer
    x = 242,994.10

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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.