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Finding the Fourth Proportional to 631,871.36, 872,005.92 and 345,410.88

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Solution

The fourth proportional to 631,871.36, 872,005.92 and 345,410.88 is: 476,679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,871.36 : 872,005.92 = 345,410.88 : x
  2. Step 2: Convert to fraction form
    631,871.36/872,005.92 = 345,410.88/x
  3. Step 3: Cross multiply
    631,871.36x = 872,005.92 × 345,410.88
  4. Step 4: Simplify right side
    631,871.36x = 301,200,332,192.41
  5. Step 5: Solve for x
    x = 301,200,332,192.41/631,871.36
  6. Step 6: Final answer
    x = 476,679.83

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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.