Home / 631,845.28-872,531.76-405,887.68

Finding the Fourth Proportional to 631,845.28, 872,531.76 and 405,887.68

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Solution

The fourth proportional to 631,845.28, 872,531.76 and 405,887.68 is: 560,500.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,845.28 : 872,531.76 = 405,887.68 : x
  2. Step 2: Convert to fraction form
    631,845.28/872,531.76 = 405,887.68/x
  3. Step 3: Cross multiply
    631,845.28x = 872,531.76 × 405,887.68
  4. Step 4: Simplify right side
    631,845.28x = 354,149,891,792.72
  5. Step 5: Solve for x
    x = 354,149,891,792.72/631,845.28
  6. Step 6: Final answer
    x = 560,500.97

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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.