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Finding the Fourth Proportional to 719,478.42, 992,881.69 and 397,188.96

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Solution

The fourth proportional to 719,478.42, 992,881.69 and 397,188.96 is: 548,121.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,478.42 : 992,881.69 = 397,188.96 : x
  2. Step 2: Convert to fraction form
    719,478.42/992,881.69 = 397,188.96/x
  3. Step 3: Cross multiply
    719,478.42x = 992,881.69 × 397,188.96
  4. Step 4: Simplify right side
    719,478.42x = 394,361,645,854.14
  5. Step 5: Solve for x
    x = 394,361,645,854.14/719,478.42
  6. Step 6: Final answer
    x = 548,121.58

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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.