Home / 728,172.28-1,004,911.74-405,884.68

Finding the Fourth Proportional to 728,172.28, 1,004,911.74 and 405,884.68

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Solution

The fourth proportional to 728,172.28, 1,004,911.74 and 405,884.68 is: 560,139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,172.28 : 1,004,911.74 = 405,884.68 : x
  2. Step 2: Convert to fraction form
    728,172.28/1,004,911.74 = 405,884.68/x
  3. Step 3: Cross multiply
    728,172.28x = 1,004,911.74 × 405,884.68
  4. Step 4: Simplify right side
    728,172.28x = 407,878,280,018.14
  5. Step 5: Solve for x
    x = 407,878,280,018.14/728,172.28
  6. Step 6: Final answer
    x = 560,139.81

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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.