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Finding the Fourth Proportional to 631,847.28, 872,534.52 and 405,889.68

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Solution

The fourth proportional to 631,847.28, 872,534.52 and 405,889.68 is: 560,503.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,847.28 : 872,534.52 = 405,889.68 : x
  2. Step 2: Convert to fraction form
    631,847.28/872,534.52 = 405,889.68/x
  3. Step 3: Cross multiply
    631,847.28x = 872,534.52 × 405,889.68
  4. Step 4: Simplify right side
    631,847.28x = 354,152,757,111.75
  5. Step 5: Solve for x
    x = 354,152,757,111.75/631,847.28
  6. Step 6: Final answer
    x = 560,503.73

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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.