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Finding the Fourth Proportional to 405,620.20, 608,516.70 and 125,165.80

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Solution

The fourth proportional to 405,620.20, 608,516.70 and 125,165.80 is: 187,775.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,620.20 : 608,516.70 = 125,165.80 : x
  2. Step 2: Convert to fraction form
    405,620.20/608,516.70 = 125,165.80/x
  3. Step 3: Cross multiply
    405,620.20x = 608,516.70 × 125,165.80
  4. Step 4: Simplify right side
    405,620.20x = 76,165,479,568.86
  5. Step 5: Solve for x
    x = 76,165,479,568.86/405,620.20
  6. Step 6: Final answer
    x = 187,775.36

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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.