Home / 728,156.78-1,004,857.45-405,859.95

Finding the Fourth Proportional to 728,156.78, 1,004,857.45 and 405,859.95

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Solution

The fourth proportional to 728,156.78, 1,004,857.45 and 405,859.95 is: 560,087.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,156.78 : 1,004,857.45 = 405,859.95 : x
  2. Step 2: Convert to fraction form
    728,156.78/1,004,857.45 = 405,859.95/x
  3. Step 3: Cross multiply
    728,156.78x = 1,004,857.45 × 405,859.95
  4. Step 4: Simplify right side
    728,156.78x = 407,831,392,384.83
  5. Step 5: Solve for x
    x = 407,831,392,384.83/728,156.78
  6. Step 6: Final answer
    x = 560,087.34

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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.