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Finding the Fourth Proportional to 631,816.32, 871,906.20 and 359,909.30

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Solution

The fourth proportional to 631,816.32, 871,906.20 and 359,909.30 is: 496,674.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,816.32 : 871,906.20 = 359,909.30 : x
  2. Step 2: Convert to fraction form
    631,816.32/871,906.20 = 359,909.30/x
  3. Step 3: Cross multiply
    631,816.32x = 871,906.20 × 359,909.30
  4. Step 4: Simplify right side
    631,816.32x = 313,807,150,107.66
  5. Step 5: Solve for x
    x = 313,807,150,107.66/631,816.32
  6. Step 6: Final answer
    x = 496,674.65

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Double scale
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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.