Home / 728,176.91-1,004,918.15-405,889.34

Finding the Fourth Proportional to 728,176.91, 1,004,918.15 and 405,889.34

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Solution

The fourth proportional to 728,176.91, 1,004,918.15 and 405,889.34 is: 560,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,176.91 : 1,004,918.15 = 405,889.34 : x
  2. Step 2: Convert to fraction form
    728,176.91/1,004,918.15 = 405,889.34/x
  3. Step 3: Cross multiply
    728,176.91x = 1,004,918.15 × 405,889.34
  4. Step 4: Simplify right side
    728,176.91x = 407,885,560,647.65
  5. Step 5: Solve for x
    x = 407,885,560,647.65/728,176.91
  6. Step 6: Final answer
    x = 560,146.25

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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.