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Finding the Fourth Proportional to 719,465.94, 992,871.05 and 397,176.21

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Solution

The fourth proportional to 719,465.94, 992,871.05 and 397,176.21 is: 548,107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,465.94 : 992,871.05 = 397,176.21 : x
  2. Step 2: Convert to fraction form
    719,465.94/992,871.05 = 397,176.21/x
  3. Step 3: Cross multiply
    719,465.94x = 992,871.05 × 397,176.21
  4. Step 4: Simplify right side
    719,465.94x = 394,344,758,671.84
  5. Step 5: Solve for x
    x = 394,344,758,671.84/719,465.94
  6. Step 6: Final answer
    x = 548,107.61

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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.