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Finding the Fourth Proportional to 405,919.10, 608,550.50 and 169,438.80

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Solution

The fourth proportional to 405,919.10, 608,550.50 and 169,438.80 is: 254,021.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,919.10 : 608,550.50 = 169,438.80 : x
  2. Step 2: Convert to fraction form
    405,919.10/608,550.50 = 169,438.80/x
  3. Step 3: Cross multiply
    405,919.10x = 608,550.50 × 169,438.80
  4. Step 4: Simplify right side
    405,919.10x = 103,112,066,459.40
  5. Step 5: Solve for x
    x = 103,112,066,459.40/405,919.10
  6. Step 6: Final answer
    x = 254,021.22

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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.