Home / 728,027.07-1,004,678.15-405,729.87

Finding the Fourth Proportional to 728,027.07, 1,004,678.15 and 405,729.87

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Solution

The fourth proportional to 728,027.07, 1,004,678.15 and 405,729.87 is: 559,907.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,027.07 : 1,004,678.15 = 405,729.87 : x
  2. Step 2: Convert to fraction form
    728,027.07/1,004,678.15 = 405,729.87/x
  3. Step 3: Cross multiply
    728,027.07x = 1,004,678.15 × 405,729.87
  4. Step 4: Simplify right side
    728,027.07x = 407,627,933,162.69
  5. Step 5: Solve for x
    x = 407,627,933,162.69/728,027.07
  6. Step 6: Final answer
    x = 559,907.66

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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.