Home / 428,272.82-642,209.79-191,617.46

Finding the Fourth Proportional to 428,272.82, 642,209.79 and 191,617.46

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Solution

The fourth proportional to 428,272.82, 642,209.79 and 191,617.46 is: 287,336.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,272.82 : 642,209.79 = 191,617.46 : x
  2. Step 2: Convert to fraction form
    428,272.82/642,209.79 = 191,617.46/x
  3. Step 3: Cross multiply
    428,272.82x = 642,209.79 × 191,617.46
  4. Step 4: Simplify right side
    428,272.82x = 123,058,608,746.93
  5. Step 5: Solve for x
    x = 123,058,608,746.93/428,272.82
  6. Step 6: Final answer
    x = 287,336.96

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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.