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Finding the Fourth Proportional to 631,399.41, 871,331.97 and 359,467.30

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Solution

The fourth proportional to 631,399.41, 871,331.97 and 359,467.30 is: 496,065.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,399.41 : 871,331.97 = 359,467.30 : x
  2. Step 2: Convert to fraction form
    631,399.41/871,331.97 = 359,467.30/x
  3. Step 3: Cross multiply
    631,399.41x = 871,331.97 × 359,467.30
  4. Step 4: Simplify right side
    631,399.41x = 313,215,348,915.32
  5. Step 5: Solve for x
    x = 313,215,348,915.32/631,399.41
  6. Step 6: Final answer
    x = 496,065.32

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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.