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Finding the Fourth Proportional to 719,480.12, 992,877 and 397,190.66

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Solution

The fourth proportional to 719,480.12, 992,877 and 397,190.66 is: 548,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,480.12 : 992,877 = 397,190.66 : x
  2. Step 2: Convert to fraction form
    719,480.12/992,877 = 397,190.66/x
  3. Step 3: Cross multiply
    719,480.12x = 992,877 × 397,190.66
  4. Step 4: Simplify right side
    719,480.12x = 394,361,470,928.82
  5. Step 5: Solve for x
    x = 394,361,470,928.82/719,480.12
  6. Step 6: Final answer
    x = 548,120.04

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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.