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Finding the Fourth Proportional to 631,634.94, 871,619.49 and 345,157.38

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Solution

The fourth proportional to 631,634.94, 871,619.49 and 345,157.38 is: 476,297.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,634.94 : 871,619.49 = 345,157.38 : x
  2. Step 2: Convert to fraction form
    631,634.94/871,619.49 = 345,157.38/x
  3. Step 3: Cross multiply
    631,634.94x = 871,619.49 × 345,157.38
  4. Step 4: Simplify right side
    631,634.94x = 300,845,899,525.34
  5. Step 5: Solve for x
    x = 300,845,899,525.34/631,634.94
  6. Step 6: Final answer
    x = 476,297.11

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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.