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Finding the Fourth Proportional to 392,605.46, 589,002.16 and 126,390.86

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Solution

The fourth proportional to 392,605.46, 589,002.16 and 126,390.86 is: 189,616.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,605.46 : 589,002.16 = 126,390.86 : x
  2. Step 2: Convert to fraction form
    392,605.46/589,002.16 = 126,390.86/x
  3. Step 3: Cross multiply
    392,605.46x = 589,002.16 × 126,390.86
  4. Step 4: Simplify right side
    392,605.46x = 74,444,489,544.26
  5. Step 5: Solve for x
    x = 74,444,489,544.26/392,605.46
  6. Step 6: Final answer
    x = 189,616.54

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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.