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Finding the Fourth Proportional to 631,501.36, 871,470.84 and 345,021.37

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Solution

The fourth proportional to 631,501.36, 871,470.84 and 345,021.37 is: 476,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,501.36 : 871,470.84 = 345,021.37 : x
  2. Step 2: Convert to fraction form
    631,501.36/871,470.84 = 345,021.37/x
  3. Step 3: Cross multiply
    631,501.36x = 871,470.84 × 345,021.37
  4. Step 4: Simplify right side
    631,501.36x = 300,676,063,131.85
  5. Step 5: Solve for x
    x = 300,676,063,131.85/631,501.36
  6. Step 6: Final answer
    x = 476,128.92

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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.