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Finding the Fourth Proportional to 719,425.27, 992,813.79 and 397,128.43

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Solution

The fourth proportional to 719,425.27, 992,813.79 and 397,128.43 is: 548,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,425.27 : 992,813.79 = 397,128.43 : x
  2. Step 2: Convert to fraction form
    719,425.27/992,813.79 = 397,128.43/x
  3. Step 3: Cross multiply
    719,425.27x = 992,813.79 × 397,128.43
  4. Step 4: Simplify right side
    719,425.27x = 394,274,581,705.05
  5. Step 5: Solve for x
    x = 394,274,581,705.05/719,425.27
  6. Step 6: Final answer
    x = 548,041.05

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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.