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Finding the Fourth Proportional to 631,879.38, 871,993.44 and 345,400.56

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Solution

The fourth proportional to 631,879.38, 871,993.44 and 345,400.56 is: 476,652.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,879.38 : 871,993.44 = 345,400.56 : x
  2. Step 2: Convert to fraction form
    631,879.38/871,993.44 = 345,400.56/x
  3. Step 3: Cross multiply
    631,879.38x = 871,993.44 × 345,400.56
  4. Step 4: Simplify right side
    631,879.38x = 301,187,022,492.33
  5. Step 5: Solve for x
    x = 301,187,022,492.33/631,879.38
  6. Step 6: Final answer
    x = 476,652.72

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1.5x scale

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.