Home / 428,270.82-642,206.79-191,615.46

Finding the Fourth Proportional to 428,270.82, 642,206.79 and 191,615.46

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Solution

The fourth proportional to 428,270.82, 642,206.79 and 191,615.46 is: 287,333.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,270.82 : 642,206.79 = 191,615.46 : x
  2. Step 2: Convert to fraction form
    428,270.82/642,206.79 = 191,615.46/x
  3. Step 3: Cross multiply
    428,270.82x = 642,206.79 × 191,615.46
  4. Step 4: Simplify right side
    428,270.82x = 123,056,749,480.97
  5. Step 5: Solve for x
    x = 123,056,749,480.97/428,270.82
  6. Step 6: Final answer
    x = 287,333.96

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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.