Home / 728,174.64-1,004,915.03-405,887.09

Finding the Fourth Proportional to 728,174.64, 1,004,915.03 and 405,887.09

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Solution

The fourth proportional to 728,174.64, 1,004,915.03 and 405,887.09 is: 560,143.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,174.64 : 1,004,915.03 = 405,887.09 : x
  2. Step 2: Convert to fraction form
    728,174.64/1,004,915.03 = 405,887.09/x
  3. Step 3: Cross multiply
    728,174.64x = 1,004,915.03 × 405,887.09
  4. Step 4: Simplify right side
    728,174.64x = 407,882,030,169.95
  5. Step 5: Solve for x
    x = 407,882,030,169.95/728,174.64
  6. Step 6: Final answer
    x = 560,143.14

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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.