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Finding the Fourth Proportional to 719,400.89, 992,761.31 and 397,102.70

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Solution

The fourth proportional to 719,400.89, 992,761.31 and 397,102.70 is: 547,995.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,400.89 : 992,761.31 = 397,102.70 : x
  2. Step 2: Convert to fraction form
    719,400.89/992,761.31 = 397,102.70/x
  3. Step 3: Cross multiply
    719,400.89x = 992,761.31 × 397,102.70
  4. Step 4: Simplify right side
    719,400.89x = 394,228,200,131.20
  5. Step 5: Solve for x
    x = 394,228,200,131.20/719,400.89
  6. Step 6: Final answer
    x = 547,995.15

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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.