Home / 428,112.54-642,175.14-203,496.12

Finding the Fourth Proportional to 428,112.54, 642,175.14 and 203,496.12

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Solution

The fourth proportional to 428,112.54, 642,175.14 and 203,496.12 is: 305,247.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,112.54 : 642,175.14 = 203,496.12 : x
  2. Step 2: Convert to fraction form
    428,112.54/642,175.14 = 203,496.12/x
  3. Step 3: Cross multiply
    428,112.54x = 642,175.14 × 203,496.12
  4. Step 4: Simplify right side
    428,112.54x = 130,680,149,350.46
  5. Step 5: Solve for x
    x = 130,680,149,350.46/428,112.54
  6. Step 6: Final answer
    x = 305,247.19

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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.