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Finding the Fourth Proportional to 631,692.56, 871,736.12 and 345,212.64

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Solution

The fourth proportional to 631,692.56, 871,736.12 and 345,212.64 is: 476,393.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,692.56 : 871,736.12 = 345,212.64 : x
  2. Step 2: Convert to fraction form
    631,692.56/871,736.12 = 345,212.64/x
  3. Step 3: Cross multiply
    631,692.56x = 871,736.12 × 345,212.64
  4. Step 4: Simplify right side
    631,692.56x = 300,934,327,368.56
  5. Step 5: Solve for x
    x = 300,934,327,368.56/631,692.56
  6. Step 6: Final answer
    x = 476,393.65

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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.