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Finding the Fourth Proportional to 631,775.24, 871,863.78 and 345,313.88

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Solution

The fourth proportional to 631,775.24, 871,863.78 and 345,313.88 is: 476,540.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,775.24 : 871,863.78 = 345,313.88 : x
  2. Step 2: Convert to fraction form
    631,775.24/871,863.78 = 345,313.88/x
  3. Step 3: Cross multiply
    631,775.24x = 871,863.78 × 345,313.88
  4. Step 4: Simplify right side
    631,775.24x = 301,066,664,703.27
  5. Step 5: Solve for x
    x = 301,066,664,703.27/631,775.24
  6. Step 6: Final answer
    x = 476,540.78

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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.