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Finding the Fourth Proportional to 631,489.76, 871,468.40 and 345,027.56

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Solution

The fourth proportional to 631,489.76, 871,468.40 and 345,027.56 is: 476,144.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,489.76 : 871,468.40 = 345,027.56 : x
  2. Step 2: Convert to fraction form
    631,489.76/871,468.40 = 345,027.56/x
  3. Step 3: Cross multiply
    631,489.76x = 871,468.40 × 345,027.56
  4. Step 4: Simplify right side
    631,489.76x = 300,680,615,669.10
  5. Step 5: Solve for x
    x = 300,680,615,669.10/631,489.76
  6. Step 6: Final answer
    x = 476,144.88

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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.