Home / 428,086.44-642,136.86-161,972.28

Finding the Fourth Proportional to 428,086.44, 642,136.86 and 161,972.28

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Solution

The fourth proportional to 428,086.44, 642,136.86 and 161,972.28 is: 242,961.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,086.44 : 642,136.86 = 161,972.28 : x
  2. Step 2: Convert to fraction form
    428,086.44/642,136.86 = 161,972.28/x
  3. Step 3: Cross multiply
    428,086.44x = 642,136.86 × 161,972.28
  4. Step 4: Simplify right side
    428,086.44x = 104,008,371,286.24
  5. Step 5: Solve for x
    x = 104,008,371,286.24/428,086.44
  6. Step 6: Final answer
    x = 242,961.14

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1.5x scale

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.