Home / 728,237.90-1,004,972.20-405,945.38

Finding the Fourth Proportional to 728,237.90, 1,004,972.20 and 405,945.38

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Solution

The fourth proportional to 728,237.90, 1,004,972.20 and 405,945.38 is: 560,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,237.90 : 1,004,972.20 = 405,945.38 : x
  2. Step 2: Convert to fraction form
    728,237.90/1,004,972.20 = 405,945.38/x
  3. Step 3: Cross multiply
    728,237.90x = 1,004,972.20 × 405,945.38
  4. Step 4: Simplify right side
    728,237.90x = 407,963,821,618.44
  5. Step 5: Solve for x
    x = 407,963,821,618.44/728,237.90
  6. Step 6: Final answer
    x = 560,206.80

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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.