Home / 428,199.21-642,298.82-178,706.25

Finding the Fourth Proportional to 428,199.21, 642,298.82 and 178,706.25

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Solution

The fourth proportional to 428,199.21, 642,298.82 and 178,706.25 is: 268,059.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,199.21 : 642,298.82 = 178,706.25 : x
  2. Step 2: Convert to fraction form
    428,199.21/642,298.82 = 178,706.25/x
  3. Step 3: Cross multiply
    428,199.21x = 642,298.82 × 178,706.25
  4. Step 4: Simplify right side
    428,199.21x = 114,782,812,608.09
  5. Step 5: Solve for x
    x = 114,782,812,608.09/428,199.21
  6. Step 6: Final answer
    x = 268,059.38

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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.