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Finding the Fourth Proportional to 631,520.35, 871,487.91 and 345,034.28

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Solution

The fourth proportional to 631,520.35, 871,487.91 and 345,034.28 is: 476,141.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,520.35 : 871,487.91 = 345,034.28 : x
  2. Step 2: Convert to fraction form
    631,520.35/871,487.91 = 345,034.28/x
  3. Step 3: Cross multiply
    631,520.35x = 871,487.91 × 345,034.28
  4. Step 4: Simplify right side
    631,520.35x = 300,693,205,734.28
  5. Step 5: Solve for x
    x = 300,693,205,734.28/631,520.35
  6. Step 6: Final answer
    x = 476,141.75

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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.