Home / 728,236.40-1,004,970.12-405,943.88

Finding the Fourth Proportional to 728,236.40, 1,004,970.12 and 405,943.88

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Solution

The fourth proportional to 728,236.40, 1,004,970.12 and 405,943.88 is: 560,204.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,236.40 : 1,004,970.12 = 405,943.88 : x
  2. Step 2: Convert to fraction form
    728,236.40/1,004,970.12 = 405,943.88/x
  3. Step 3: Cross multiply
    728,236.40x = 1,004,970.12 × 405,943.88
  4. Step 4: Simplify right side
    728,236.40x = 407,961,469,796.87
  5. Step 5: Solve for x
    x = 407,961,469,796.87/728,236.40
  6. Step 6: Final answer
    x = 560,204.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.