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Finding the Fourth Proportional to 631,863.36, 871,994.88 and 345,402.88

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Solution

The fourth proportional to 631,863.36, 871,994.88 and 345,402.88 is: 476,668.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,863.36 : 871,994.88 = 345,402.88 : x
  2. Step 2: Convert to fraction form
    631,863.36/871,994.88 = 345,402.88/x
  3. Step 3: Cross multiply
    631,863.36x = 871,994.88 × 345,402.88
  4. Step 4: Simplify right side
    631,863.36x = 301,189,542,897.25
  5. Step 5: Solve for x
    x = 301,189,542,897.25/631,863.36
  6. Step 6: Final answer
    x = 476,668.79

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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.