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Finding the Fourth Proportional to 631,553.28, 872,125.56 and 405,592.44

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Solution

The fourth proportional to 631,553.28, 872,125.56 and 405,592.44 is: 560,091.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,553.28 : 872,125.56 = 405,592.44 : x
  2. Step 2: Convert to fraction form
    631,553.28/872,125.56 = 405,592.44/x
  3. Step 3: Cross multiply
    631,553.28x = 872,125.56 × 405,592.44
  4. Step 4: Simplify right side
    631,553.28x = 353,727,533,866.77
  5. Step 5: Solve for x
    x = 353,727,533,866.77/631,553.28
  6. Step 6: Final answer
    x = 560,091.36

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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.