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Finding the Fourth Proportional to 631,662.79, 871,706.06 and 345,194.95

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Solution

The fourth proportional to 631,662.79, 871,706.06 and 345,194.95 is: 476,375.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,662.79 : 871,706.06 = 345,194.95 : x
  2. Step 2: Convert to fraction form
    631,662.79/871,706.06 = 345,194.95/x
  3. Step 3: Cross multiply
    631,662.79x = 871,706.06 × 345,194.95
  4. Step 4: Simplify right side
    631,662.79x = 300,908,529,796.40
  5. Step 5: Solve for x
    x = 300,908,529,796.40/631,662.79
  6. Step 6: Final answer
    x = 476,375.27

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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.