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Finding the Fourth Proportional to 719,163.82, 992,469.90 and 392,494.72

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Solution

The fourth proportional to 719,163.82, 992,469.90 and 392,494.72 is: 541,655.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,163.82 : 992,469.90 = 392,494.72 : x
  2. Step 2: Convert to fraction form
    719,163.82/992,469.90 = 392,494.72/x
  3. Step 3: Cross multiply
    719,163.82x = 992,469.90 × 392,494.72
  4. Step 4: Simplify right side
    719,163.82x = 389,539,195,508.93
  5. Step 5: Solve for x
    x = 389,539,195,508.93/719,163.82
  6. Step 6: Final answer
    x = 541,655.72

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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.