Home / 405,121.46-607,669.11-120,814.36

Finding the Fourth Proportional to 405,121.46, 607,669.11 and 120,814.36

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Solution

The fourth proportional to 405,121.46, 607,669.11 and 120,814.36 is: 181,217.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,121.46 : 607,669.11 = 120,814.36 : x
  2. Step 2: Convert to fraction form
    405,121.46/607,669.11 = 120,814.36/x
  3. Step 3: Cross multiply
    405,121.46x = 607,669.11 × 120,814.36
  4. Step 4: Simplify right side
    405,121.46x = 73,415,153,097.25
  5. Step 5: Solve for x
    x = 73,415,153,097.25/405,121.46
  6. Step 6: Final answer
    x = 181,217.64

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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.