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Finding the Fourth Proportional to 405,998.80, 609,015.48 and 125,521.36

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Solution

The fourth proportional to 405,998.80, 609,015.48 and 125,521.36 is: 188,287.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,998.80 : 609,015.48 = 125,521.36 : x
  2. Step 2: Convert to fraction form
    405,998.80/609,015.48 = 125,521.36/x
  3. Step 3: Cross multiply
    405,998.80x = 609,015.48 × 125,521.36
  4. Step 4: Simplify right side
    405,998.80x = 76,444,451,310.65
  5. Step 5: Solve for x
    x = 76,444,451,310.65/405,998.80
  6. Step 6: Final answer
    x = 188,287.38

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1.5x scale

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.