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Finding the Fourth Proportional to 392,607.96, 589,005.90 and 126,393.36

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Solution

The fourth proportional to 392,607.96, 589,005.90 and 126,393.36 is: 189,620.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,607.96 : 589,005.90 = 126,393.36 : x
  2. Step 2: Convert to fraction form
    392,607.96/589,005.90 = 126,393.36/x
  3. Step 3: Cross multiply
    392,607.96x = 589,005.90 × 126,393.36
  4. Step 4: Simplify right side
    392,607.96x = 74,446,434,760.82
  5. Step 5: Solve for x
    x = 74,446,434,760.82/392,607.96
  6. Step 6: Final answer
    x = 189,620.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.